| american samoa | | pennaria disticha | species | 1 | 0 |
| antarctica | | candelabrum austrogeorgiae | species | 1 | 0 |
| antarctica | | corymorpha sp. pc-2009b | species | 1 | 0 |
| antarctica | | tubularia sp. pc-2009f | species | 1 | 0 |
| argentina | buenos aires province | ectopleura crocea | species | 4 | 0 |
| argentina | buenos aires province | hydra vulgaris | species | 3 | 0 |
| argentina | cordoba province | hydra vulgaris | species | 2 | 0 |
| argentina | neuquen province | hydra vulgaris | species | 4 | 0 |
| australia | | hydra viridissima | species | 1 | 0 |
| australia | new south wales | eleutheria dichotoma | species | 1 | 0 |
| australia | new south wales | hydra viridissima | species | 2 | 0 |
| australia | new south wales | hydra vulgaris | species | 3 | 0 |
| australia | queensland | pteroclava krempfi | species | 4 | 0 |
| austria | tyrol | hydra vulgaris | species | 1 | 0 |
| brazil | | cladocoryne floccosa | species | 3 | 0 |
| brazil | | ectopleura dumortierii | species | 1 | 0 |
| brazil | | ectopleura obypa | species | 3 | 0 |
| brazil | | moerisia inkermanica | species | 4 | 0 |
| brazil | | pennaria disticha | species | 27 | 0 |
| brazil | parana | ectopleura crocea | species | 2 | 0 |
| brazil | rio de janeiro | ectopleura crocea | species | 4 | 0 |
| brazil | santa catarina | ectopleura crocea | species | 4 | 0 |
| brazil | sao paulo | ectopleura crocea | species | 3 | 0 |
| canada | british columbia | brinckmannia hexactinellidophila | species | 1 | 0 |
| canada | british columbia | coryne cliffordi | species | 3 | 0 |
| canada | british columbia | hydra oligactis | species | 2 | 0 |
| canada | british columbia | sarsia apicula | species | 2 | 0 |
| canada | british columbia | sarsia princeps | species | 1 | 0 |
| canada | british columbia | stauridiosarsia cliffordi | species | 1 | 0 |
| canada | nova scotia | ectopleura larynx | species | 1 | 0 |
| canada | nova scotia | sarsia lovenii | species | 2 | 0 |
| canada | nova scotia | sarsia tubulosa | species | 2 | 0 |
| canada | nunavut | sarsia princeps | species | 1 | 0 |
| canada | ontario | hydra circumcincta | species | 1 | 0 |
| canada | ontario | hydra hymanae | species | 1 | 0 |
| canada | ontario | hydra oligactis | species | 2 | 0 |
| canada | ontario | hydra vulgaris | species | 1 | 0 |
| chile | | hybocodon chilensis | species | 3 | 0 |
| chile | aysen region | hydra viridissima | species | 2 | 0 |
| chile | aysen region | hydra vulgaris | species | 1 | 0 |
| chile | los lagos region | coryne eximia | species | 2 | 0 |
| chile | los lagos region | ectopleura dumortierii | species | 1 | 0 |
| chile | magallanes region | hydra vulgaris | species | 1 | 0 |
| chile | santiago metropolitan region | hydra vulgaris | species | 4 | 0 |
| china | anhui | hydra sp. swl-2010 | species | 2 | 0 |
| china | anhui | hydra vulgaris | species | 1 | 0 |
| china | chongqing | hydra vulgaris | species | 1 | 0 |
| china | guangdong | hydra sinensis | species | 2 | 0 |
| costa rica | guanacaste province | hydra vulgaris | species | 5 | 0 |
| egypt | | zanclea sp. da001 | species | 4 | 0 |
| egypt | | zanclea sp. da002 | species | 2 | 0 |
| faroe islands | | hydra circumcincta | species | 2 | 0 |
| france | | coryne muscoides | species | 2 | 0 |
| france | | ectopleura dumortierii | species | 1 | 0 |
| france | | hydra oligactis | species | 2 | 0 |
| france | bretagne region | candelabrum cocksii | species | 1 | 0 |
| france | bretagne region | codonium proliferum | species | 1 | 0 |
| france | bretagne region | coryne eximia | species | 1 | 0 |
| france | bretagne region | coryne fucicola | species | 2 | 0 |
| france | bretagne region | coryne muscoides | species | 14 | 0 |
| france | bretagne region | coryne pintneri | species | 1 | 0 |
| france | bretagne region | coryne prolifera | species | 2 | 0 |
| france | bretagne region | coryne pusilla | species | 1 | 0 |
| france | bretagne region | ectopleura larynx | species | 1 | 0 |
| france | bretagne region | eleutheria claparedei | species | 3 | 0 |
| france | bretagne region | zanclea sessilis | species | 1 | 0 |
| france | corse region | hydra vulgaris | species | 2 | 0 |
| france | languedoc-roussillon region | coryne eximia | species | 1 | 0 |
| france | languedoc-roussillon region | coryne muscoides | species | 3 | 0 |
| france | languedoc-roussillon region | coryne sp. 32961 | species | 1 | 0 |
| france | languedoc-roussillon region | dipurena ophiogaster | species | 2 | 0 |
| france | languedoc-roussillon region | eleutheria dichotoma | species | 1 | 0 |
| france | provence-alpes-cote d'azur region | cladocoryne floccosa | species | 2 | 0 |
| france | provence-alpes-cote d'azur region | coryne pintneri | species | 5 | 0 |
| france | provence-alpes-cote d'azur region | dipurena halterata | species | 7 | 0 |
| france | provence-alpes-cote d'azur region | stauridiosarsia ophiogaster | species | 1 | 0 |
| france | provence-alpes-cote d'azur region | velella velella | species | 2 | 0 |
| french polynesia | | cladonema sp. bmoo-08899 | species | 1 | 0 |
| french polynesia | | velella velella | species | 1 | 0 |
| germany | | hydra circumcincta | species | 2 | 0 |
| germany | | hydra oligactis | species | 2 | 0 |
| germany | bavaria | hydra viridissima | species | 2 | 0 |
| greece | crete region | coryne muscoides | species | 2 | 0 |
| guadeloupe | | cladocoryne floccosa | species | 3 | 0 |
| guadeloupe | | zyzzyzus warreni | species | 1 | 0 |
| honduras | | pennaria disticha | species | 1 | 0 |
| hungary | budapest | hydra vulgaris | species | 1 | 0 |
| iceland | | hydra circumcincta | species | 2 | 0 |
| iceland | | hydra oligactis | species | 1 | 0 |
| iceland | | sarsia lovenii | species | 2 | 0 |
| india | | pennaria disticha | species | 1 | 0 |
| indonesia | | candelabrum sp. pc0003 | species | 2 | 0 |
| indonesia | bali province | zanclea gallii | species | 9 | 0 |
| israel | | zanclea sp. ei020 | species | 3 | 0 |
| israel | southern district | pteroclava krempfi | species | 2 | 0 |
| israel | southern district | zanclea sp. ei020 | species | 1 | 0 |
| italy | | pennaria sp. dm-2017 | species | 4 | 0 |
| italy | apulia region | coryne muscoides | species | 1 | 0 |
| italy | calabria region | coryne muscoides | species | 1 | 0 |
| italy | tuscany region | cladonema radiatum | species | 5 | 0 |
| italy | tuscany region | coryne epizoica | species | 2 | 0 |
| japan | | cladonema pacificum | species | 18 | 0 |
| japan | | coryne uchidai | species | 2 | 0 |
| japan | | dipurena ophiogaster | species | 3 | 0 |
| japan | | dipurena sp. amn-2009 | species | 1 | 0 |
| japan | | hydra oligactis | species | 1 | 0 |
| japan | | hydra vulgaris | species | 47 | 0 |
| japan | aichi prefecture | coryne nipponica | species | 25 | 0 |
| japan | hokkaido prefecture | coryne pusilla | species | 2 | 0 |
| japan | hokkaido prefecture | coryne uchidai | species | 1 | 0 |
| japan | nagasaki prefecture | coryne sp. 35439 | species | 4 | 0 |
| japan | niigata prefecture | coryne sp. 35436 | species | 1 | 0 |
| japan | okinawa prefecture | coryne nipponica | species | 3 | 0 |
| japan | okinawa prefecture | porpita porpita | species | 1 | 0 |
| japan | okinawa prefecture | velella velella | species | 1 | 0 |
| madagascar | | hydra viridissima | species | 1 | 0 |
| maldives | | pteroclava krempfi | species | 30 | 0 |
| maldives | | zanclea gallii | species | 27 | 0 |
| maldives | | zanclea sango | species | 21 | 0 |
| maldives | | zanclea sp. ka037 | species | 1 | 0 |
| maldives | | zanclea sp. ka074 | species | 1 | 0 |
| maldives | | zanclea sp. ka148 | species | 1 | 0 |
| maldives | | zanclea sp. ma001 | species | 5 | 0 |
| maldives | | zanclea sp. ma002 | species | 3 | 0 |
| maldives | | zanclea sp. ma003 | species | 3 | 0 |
| maldives | | zanclea sp. ma004 | species | 3 | 0 |
| maldives | | zanclea sp. ma005 | species | 3 | 0 |
| maldives | | zanclea sp. ma006 | species | 5 | 0 |
| maldives | | zanclea sp. ma007 | species | 3 | 0 |
| maldives | | zanclea sp. ma008 | species | 3 | 0 |
| maldives | | zanclea sp. ma009 | species | 3 | 0 |
| maldives | | zanclea sp. ma010 | species | 3 | 0 |
| maldives | | zanclea sp. ma011 | species | 5 | 0 |
| maldives | | zanclea sp. ma012 | species | 3 | 0 |
| maldives | | zanclea sp. ma013 | species | 3 | 0 |
| maldives | | zanclea sp. ma014 | species | 1 | 0 |
| maldives | | zanclea sp. ma015 | species | 2 | 0 |
| maldives | | zanclea sp. ma016 | species | 3 | 0 |
| maldives | | zanclea sp. ma017 | species | 3 | 0 |
| maldives | | zanclea sp. ma018 | species | 3 | 0 |
| maldives | | zanclea sp. ma019 | species | 3 | 0 |
| maldives | | zanclea sp. ma020 | species | 3 | 0 |
| maldives | | zanclea sp. ma021 | species | 3 | 0 |
| maldives | | zanclea sp. ma022 | species | 3 | 0 |
| maldives | | zanclea sp. ma023 | species | 3 | 0 |
| maldives | | zanclea sp. ma024 | species | 3 | 0 |
| maldives | | zanclea sp. ma025 | species | 3 | 0 |
| maldives | | zanclea sp. ma026 | species | 2 | 0 |
| maldives | | zanclea sp. ma027 | species | 3 | 0 |
| maldives | | zanclea sp. ma028 | species | 3 | 0 |
| maldives | | zanclea sp. ma029 | species | 2 | 0 |
| maldives | | zanclea sp. ma030 | species | 3 | 0 |
| maldives | | zanclea sp. ma031 | species | 3 | 0 |
| maldives | | zanclea sp. ma032 | species | 3 | 0 |
| maldives | | zanclea sp. ma033 | species | 3 | 0 |
| maldives | | zanclea sp. ma034 | species | 3 | 0 |
| maldives | | zanclea sp. ma035 | species | 3 | 0 |
| maldives | | zanclea sp. ma036 | species | 3 | 0 |
| maldives | | zanclea sp. ma037 | species | 3 | 0 |
| maldives | | zanclea sp. ma038 | species | 3 | 0 |
| maldives | | zanclea sp. ma039 | species | 3 | 0 |
| maldives | | zanclea sp. ma040 | species | 3 | 0 |
| maldives | | zanclea sp. ma041 | species | 3 | 0 |
| maldives | | zanclea sp. ma042 | species | 3 | 0 |
| maldives | | zanclea sp. ma043 | species | 3 | 0 |
| maldives | | zanclea sp. ma044 | species | 3 | 0 |
| maldives | | zanclea sp. ma045 | species | 3 | 0 |
| maldives | | zanclea sp. ma046 | species | 5 | 0 |
| maldives | | zanclea sp. ma047 | species | 3 | 0 |
| maldives | | zanclea sp. ma048 | species | 3 | 0 |
| maldives | | zanclea sp. ma049 | species | 3 | 0 |
| maldives | | zanclea sp. ma050 | species | 1 | 0 |
| maldives | | zanclea sp. ma061 | species | 5 | 0 |
| maldives | | zanclea sp. ma062 | species | 3 | 0 |
| maldives | | zanclea sp. ma063 | species | 3 | 0 |
| maldives | | zanclea sp. ma064 | species | 3 | 0 |
| maldives | | zanclea sp. ma065 | species | 3 | 0 |
| maldives | faafu atoll | pteroclava krempfi | species | 43 | 0 |
| maldives | faafu atoll | zanclea gallii | species | 16 | 0 |
| maldives | faafu atoll | zanclea sango | species | 29 | 0 |
| maldives | faafu atoll | zanclea sp. ma001 | species | 1 | 0 |
| maldives | faafu atoll | zanclea sp. ma002 | species | 1 | 0 |
| maldives | faafu atoll | zanclea sp. ma003 | species | 1 | 0 |
| maldives | faafu atoll | zanclea sp. ma004 | species | 1 | 0 |
| maldives | faafu atoll | zanclea sp. ma005 | species | 1 | 0 |
| maldives | faafu atoll | zanclea sp. ma006 | species | 1 | 0 |
| maldives | faafu atoll | zanclea sp. ma007 | species | 1 | 0 |
| maldives | faafu atoll | zanclea sp. ma008 | species | 1 | 0 |
| maldives | faafu atoll | zanclea sp. ma009 | species | 1 | 0 |
| maldives | faafu atoll | zanclea sp. ma010 | species | 1 | 0 |
| maldives | faafu atoll | zanclea sp. ma011 | species | 1 | 0 |
| maldives | faafu atoll | zanclea sp. ma012 | species | 1 | 0 |
| maldives | faafu atoll | zanclea sp. ma013 | species | 1 | 0 |
| maldives | faafu atoll | zanclea sp. ma014 | species | 1 | 0 |
| maldives | faafu atoll | zanclea sp. ma015 | species | 1 | 0 |
| maldives | faafu atoll | zanclea sp. ma016 | species | 1 | 0 |
| maldives | faafu atoll | zanclea sp. ma017 | species | 1 | 0 |
| maldives | faafu atoll | zanclea sp. ma018 | species | 1 | 0 |
| maldives | faafu atoll | zanclea sp. ma019 | species | 1 | 0 |
| maldives | faafu atoll | zanclea sp. ma020 | species | 1 | 0 |
| maldives | faafu atoll | zanclea sp. ma021 | species | 1 | 0 |
| maldives | faafu atoll | zanclea sp. ma022 | species | 1 | 0 |
| maldives | faafu atoll | zanclea sp. ma023 | species | 1 | 0 |
| maldives | faafu atoll | zanclea sp. ma024 | species | 1 | 0 |
| maldives | faafu atoll | zanclea sp. ma025 | species | 1 | 0 |
| maldives | faafu atoll | zanclea sp. ma026 | species | 1 | 0 |
| maldives | faafu atoll | zanclea sp. ma027 | species | 1 | 0 |
| maldives | faafu atoll | zanclea sp. ma028 | species | 1 | 0 |
| maldives | faafu atoll | zanclea sp. ma029 | species | 1 | 0 |
| maldives | faafu atoll | zanclea sp. ma030 | species | 1 | 0 |
| maldives | faafu atoll | zanclea sp. ma031 | species | 1 | 0 |
| maldives | faafu atoll | zanclea sp. ma032 | species | 1 | 0 |
| maldives | faafu atoll | zanclea sp. ma033 | species | 1 | 0 |
| maldives | faafu atoll | zanclea sp. ma034 | species | 1 | 0 |
| maldives | faafu atoll | zanclea sp. ma035 | species | 1 | 0 |
| maldives | faafu atoll | zanclea sp. ma036 | species | 1 | 0 |
| maldives | faafu atoll | zanclea sp. ma037 | species | 1 | 0 |
| maldives | faafu atoll | zanclea sp. ma038 | species | 1 | 0 |
| maldives | faafu atoll | zanclea sp. ma039 | species | 1 | 0 |
| maldives | faafu atoll | zanclea sp. ma040 | species | 1 | 0 |
| maldives | faafu atoll | zanclea sp. ma041 | species | 1 | 0 |
| maldives | faafu atoll | zanclea sp. ma042 | species | 1 | 0 |
| maldives | faafu atoll | zanclea sp. ma043 | species | 1 | 0 |
| maldives | faafu atoll | zanclea sp. ma044 | species | 1 | 0 |
| maldives | faafu atoll | zanclea sp. ma045 | species | 1 | 0 |
| maldives | faafu atoll | zanclea sp. ma046 | species | 1 | 0 |
| maldives | faafu atoll | zanclea sp. ma047 | species | 1 | 0 |
| maldives | faafu atoll | zanclea sp. ma048 | species | 1 | 0 |
| maldives | faafu atoll | zanclea sp. ma049 | species | 1 | 0 |
| maldives | faafu atoll | zanclea sp. ma050 | species | 1 | 0 |
| maldives | faafu atoll | zanclea sp. ma061 | species | 1 | 0 |
| maldives | faafu atoll | zanclea sp. ma062 | species | 1 | 0 |
| maldives | faafu atoll | zanclea sp. ma063 | species | 1 | 0 |
| maldives | faafu atoll | zanclea sp. ma064 | species | 1 | 0 |
| maldives | faafu atoll | zanclea sp. ma065 | species | 1 | 0 |
| martinique | | ralpharia gorgoniae | species | 1 | 0 |
| mexico | chihuahua | hydra vulgaris | species | 3 | 0 |
| netherlands | | hydra circumcincta | species | 1 | 0 |
| netherlands | | hydra oxycnida | species | 3 | 0 |
| netherlands | | pennaria sp. dm-2017 | species | 2 | 0 |
| new caledonia | | hydra viridissima | species | 1 | 0 |
| new zealand | | hydra vulgaris | species | 2 | 0 |
| new zealand | | staurocladia vallentini | species | 3 | 0 |
| new zealand | | staurocladia wellingtoni | species | 1 | 0 |
| new zealand | wellington | coryne eximia | species | 4 | 0 |
| new zealand | wellington | coryne japonica | species | 1 | 0 |
| new zealand | wellington | coryne tricycla | species | 2 | 0 |
| new zealand | wellington | euphysa intermedia | species | 1 | 0 |
| new zealand | wellington | staurocladia wellingtoni | species | 3 | 0 |
| norway | | corymorpha nutans | species | 1 | 0 |
| norway | | ectopleura larynx | species | 1 | 0 |
| norway | | euphysa aurata | species | 4 | 0 |
| norway | | euphysa tentaculata | species | 1 | 0 |
| norway | | hydra circumcincta | species | 4 | 0 |
| norway | | hydra oligactis | species | 1 | 0 |
| norway | hordaland county | coryne producta | species | 3 | 0 |
| norway | hordaland county | eleutheria dichotoma | species | 1 | 0 |
| norway | hordaland county | sarsia lovenii | species | 3 | 0 |
| norway | hordaland county | sarsia tubulosa | species | 3 | 0 |
| norway | hordaland county | stauridiosarsia producta | species | 1 | 0 |
| panama | | pennaria sp. dm-2017 | species | 2 | 0 |
| panama | bocas del toro province | pennaria disticha | species | 3 | 0 |
| panama | bocas del toro province | pteroclava krempfi | species | 1 | 0 |
| panama | cocle province | hydra vulgaris | species | 1 | 0 |
| portugal | | coryne eximia | species | 1 | 0 |
| portugal | acores autonomous region | pennaria disticha | species | 1 | 0 |
| portugal | madeira autonomous region | coryne sp. 736 | species | 1 | 0 |
| portugal | madeira autonomous region | pennaria disticha | species | 1 | 0 |
| russia | | candelabrum phrygium | species | 3 | 0 |
| russia | | monocoryne bracteata | species | 2 | 0 |
| saudi arabia | | pennaria sp. dm-2017 | species | 6 | 0 |
| saudi arabia | | zanclea sp. ka037 | species | 4 | 0 |
| saudi arabia | | zanclea sp. ka074 | species | 4 | 0 |
| saudi arabia | | zanclea sp. ka148 | species | 4 | 0 |
| south africa | | coryne eximia | species | 2 | 0 |
| south africa | | ectopleura crocea | species | 1 | 0 |
| south africa | | hydra vulgaris | species | 9 | 0 |
| south africa | the western cape province | coryne eximia | species | 5 | 0 |
| south korea | | coryne pusilla | species | 1 | 0 |
| south korea | | coryne sp. 32946 | species | 1 | 0 |
| spain | andalusia | coryne muscoides | species | 25 | 0 |
| spain | balearic islands | coryne muscoides | species | 4 | 0 |
| spain | balearic islands | ectopleura wrighti | species | 1 | 0 |
| spain | balearic islands | pennaria disticha | species | 12 | 0 |
| spain | canary islands | hydra vulgaris | species | 1 | 0 |
| spain | galicia | coryne muscoides | species | 1 | 0 |
| spain | galicia | hydra circumcincta | species | 1 | 0 |
| sweden | | hydra oligactis | species | 1 | 0 |
| sweden | varmland | ectopleura larynx | species | 1 | 0 |
| sweden | varmland | tubularia indivisa | species | 1 | 0 |
| switzerland | | dipurena reesi | species | 3 | 0 |
| switzerland | | hydra oligactis | species | 3 | 0 |
| switzerland | | hydra viridissima | species | 1 | 0 |
| switzerland | | hydra vulgaris | species | 48 | 0 |
| switzerland | bern region | hydra circumcincta | species | 2 | 0 |
| switzerland | bern region | hydra oligactis | species | 3 | 0 |
| switzerland | bern region | hydra viridissima | species | 2 | 0 |
| switzerland | bern region | hydra vulgaris | species | 2 | 0 |
| switzerland | fribourg region | hydra circumcincta | species | 1 | 0 |
| switzerland | fribourg region | hydra oligactis | species | 2 | 0 |
| switzerland | fribourg region | hydra vulgaris | species | 3 | 0 |
| switzerland | geneva region | hydra circumcincta | species | 1 | 0 |
| switzerland | geneva region | hydra oligactis | species | 4 | 0 |
| switzerland | geneva region | hydra viridissima | species | 3 | 0 |
| switzerland | geneva region | hydra vulgaris | species | 1 | 0 |
| switzerland | st. gallen region | hydra oligactis | species | 1 | 0 |
| switzerland | st. gallen region | hydra vulgaris | species | 1 | 0 |
| switzerland | zurich region | hydra circumcincta | species | 1 | 0 |
| switzerland | zurich region | hydra oligactis | species | 2 | 0 |
| thailand | | hydra vulgaris | species | 1 | 0 |
| united arab emirates | | pennaria sp. dm-2017 | species | 1 | 0 |
| united kingdom | | hybocodon prolifer | species | 2 | 0 |
| united kingdom | | sarsia tubulosa | species | 3 | 0 |
| united kingdom | | tubularia indivisa | species | 2 | 0 |
| united kingdom | england | corymorpha nutans | species | 1 | 0 |
| united kingdom | england | coryne muscoides | species | 1 | 0 |
| united kingdom | england | ectopleura dumortierii | species | 1 | 0 |
| united kingdom | england | ectopleura larynx | species | 1 | 0 |
| united kingdom | england | tubularia indivisa | species | 2 | 0 |
| united kingdom | scotland | corymorpha groenlandica | species | 1 | 0 |
| united kingdom | scotland | coryne pusilla | species | 3 | 0 |
| united kingdom | scotland | hydra circumcincta | species | 1 | 0 |
| united kingdom | scotland | hydra viridissima | species | 1 | 0 |
| united kingdom | scotland | sarsia striata | species | 6 | 0 |
| united kingdom | scotland | sarsia tubulosa | species | 1 | 0 |
| united states | | ectopleura larynx | species | 3 | 0 |
| united states | | hydra vulgaris | species | 28 | 0 |
| united states | alabama | hydra vulgaris | species | 3 | 0 |
| united states | alaska | hydra canadensis | species | 9 | 0 |
| united states | alaska | hydra circumcincta | species | 5 | 0 |
| united states | alaska | hydra hymanae | species | 1 | 0 |
| united states | alaska | hydra utahensis | species | 3 | 0 |
| united states | arizona | hydra oligactis | species | 1 | 0 |
| united states | arizona | hydra vulgaris | species | 5 | 0 |
| united states | california | coryne uchidai | species | 1 | 0 |
| united states | california | ectopleura crocea | species | 3 | 0 |
| united states | california | ectopleura marina | species | 3 | 0 |
| united states | california | hydra viridissima | species | 2 | 0 |
| united states | california | hydra vulgaris | species | 19 | 0 |
| united states | california | pennaria sp. amn-2009 | species | 1 | 0 |
| united states | california | polyorchis haplus | species | 2 | 0 |
| united states | california | scrippsia pacifica | species | 2 | 0 |
| united states | california | stauridiosarsia cliffordi | species | 1 | 0 |
| united states | colorado | hydra oligactis | species | 2 | 0 |
| united states | colorado | hydra vulgaris | species | 4 | 0 |
| united states | florida | hydra viridissima | species | 2 | 0 |
| united states | florida | hydra vulgaris | species | 3 | 0 |
| united states | florida | pennaria disticha | species | 29 | 0 |
| united states | georgia | hydra vulgaris | species | 3 | 0 |
| united states | hawaii | coryne nipponica | species | 2 | 0 |
| united states | hawaii | hydra vulgaris | species | 15 | 0 |
| united states | hawaii | pennaria disticha | species | 22 | 0 |
| united states | idaho | polyorchis penicillatus | species | 2 | 0 |
| united states | illinois | hydra canadensis | species | 3 | 0 |
| united states | illinois | hydra oligactis | species | 2 | 0 |
| united states | illinois | hydra vulgaris | species | 1 | 0 |
| united states | louisiana | hydra vulgaris | species | 1 | 0 |
| united states | maine | corymorpha pendula | species | 1 | 0 |
| united states | maine | ectopleura larynx | species | 1 | 0 |
| united states | massachusetts | ectopleura crocea | species | 1 | 0 |
| united states | massachusetts | ectopleura larynx | species | 1 | 0 |
| united states | montana | hydra hymanae | species | 2 | 0 |
| united states | nebraska | hydra vulgaris | species | 3 | 0 |
| united states | new jersey | hydra vulgaris | species | 3 | 0 |
| united states | new jersey | moerisia inkermanica | species | 4 | 0 |
| united states | new mexico | hydra vulgaris | species | 3 | 0 |
| united states | new york | ectopleura crocea | species | 1 | 0 |
| united states | new york | hydra vulgaris | species | 1 | 0 |
| united states | north carolina | coryne eximia | species | 1 | 0 |
| united states | north carolina | ectopleura crocea | species | 1 | 0 |
| united states | north carolina | pennaria disticha | species | 1 | 0 |
| united states | oregon | hydra hymanae | species | 2 | 0 |
| united states | oregon | hydra vulgaris | species | 4 | 0 |
| united states | pennsylvania | hydra viridissima | species | 3 | 0 |
| united states | pennsylvania | hydra vulgaris | species | 3 | 0 |
| united states | south carolina | hydra vulgaris | species | 1 | 0 |
| united states | utah | hydra vulgaris | species | 1 | 0 |
| united states | virginia | moerisia lyonsi | species | 1 | 0 |
| united states | washington | hydra vulgaris | species | 1 | 0 |
| united states | wyoming | hydra utahensis | species | 3 | 0 |
| united states | wyoming | hydra vulgaris | species | 1 | 0 |