| australia | | ceramium filicula | species | 1 | 0 |
| australia | victoria | ceramium filicula | species | 1 | 0 |
| brazil | | ceramium affine | species | 1 | 0 |
| brazil | | ceramium brasiliense | species | 3 | 0 |
| brazil | | ceramium brevizonatum var. caraibicum | varietas | 9 | 0 |
| brazil | | ceramium clarionense | species | 1 | 0 |
| brazil | | ceramium dawsonii | species | 7 | 0 |
| brazil | | ceramium filicula | species | 1 | 0 |
| brazil | | ceramium fujianum | species | 3 | 0 |
| brazil | | ceramium nitens | species | 1 | 0 |
| brazil | | ceramium tenerrimum | species | 1 | 0 |
| canada | british columbia | ceramium pacificum | species | 55 | 0 |
| canada | british columbia | ceramium sp. 1bc | species | 3 | 0 |
| canada | new brunswick | ceramium virgatum | species | 12 | 0 |
| canada | new brunswick | ceramium virgatum sp. 2 mrb-2015 | species | 4 | 0 |
| canada | newfoundland and labrador | ceramium virgatum | species | 8 | 0 |
| canada | nova scotia | ceramium sp. csp.1.3/dg#22 | species | 1 | 0 |
| canada | nova scotia | ceramium virgatum | species | 20 | 0 |
| canada | prince edward island | ceramium virgatum | species | 1 | 0 |
| china | | ceramium diaphanum | species | 3 | 0 |
| china | | ceramium filicula | species | 5 | 0 |
| china | | ceramium japonicum | species | 3 | 0 |
| china | | ceramium kondoi | species | 18 | 0 |
| china | | ceramium tenerrimum | species | 2 | 0 |
| denmark | | ceramium deslongchampsii | species | 1 | 0 |
| denmark | | ceramium secundatum | species | 2 | 0 |
| denmark | region of southern denmark | ceramium secundatum | species | 573 | 0 |
| faroe islands | | ceramium secundatum | species | 1 | 0 |
| finland | southwest finland region | ceramium tenuicorne | species | 6 | 0 |
| france | | ceramium ciliatum | species | 2 | 0 |
| france | | ceramium deslongchampsii | species | 1 | 0 |
| france | bretagne region | ceramium deslongchampsii | species | 1 | 0 |
| france | bretagne region | ceramium echionotum | species | 1 | 0 |
| france | bretagne region | ceramium secundatum | species | 18 | 0 |
| france | bretagne region | ceramium siliquosum | species | 2 | 0 |
| france | bretagne region | ceramium sp. llg-2014 | species | 23 | 0 |
| france | languedoc-roussillon region | ceramium ciliatum | species | 2 | 0 |
| germany | schleswig-holstein | ceramium virgatum | species | 2 | 0 |
| india | | ceramium sp. | species | 1 | 0 |
| ireland | | ceramium shuttleworthianum | species | 1 | 0 |
| ireland | | ceramium siliquosum | species | 1 | 0 |
| ireland | connaught province | ceramium siliquosum | species | 58 | 0 |
| japan | aomori prefecture | ceramium kondoi | species | 27 | 0 |
| japan | chiba prefecture | ceramium kondoi | species | 6 | 0 |
| japan | fukuoka prefecture | ceramium boydenii | species | 6 | 0 |
| japan | fukuoka prefecture | ceramium kondoi | species | 3 | 0 |
| japan | hokkaido prefecture | ceramium boydenii | species | 3 | 0 |
| japan | hokkaido prefecture | ceramium kondoi | species | 411 | 0 |
| japan | niigata prefecture | ceramium kondoi | species | 3 | 0 |
| mexico | baja california | ceramium affine | species | 2 | 0 |
| mexico | baja california | ceramium horridum | species | 3 | 0 |
| mexico | baja california sur | ceramium affine | species | 2 | 0 |
| mexico | baja california sur | ceramium horridum | species | 5 | 0 |
| mexico | baja california sur | ceramium interruptum | species | 3 | 0 |
| norway | | ceramium pallidum | species | 1 | 0 |
| norway | | ceramium sp. tmg-2002-3 | species | 1 | 0 |
| norway | | ceramium tenuicorne | species | 3 | 0 |
| norway | akershus county | ceramium cimbricum | species | 2 | 0 |
| norway | aust-agder county | ceramium diaphanum | species | 1 | 0 |
| norway | aust-agder county | ceramium pallidum | species | 1 | 0 |
| norway | hordaland county | ceramium diaphanum | species | 1 | 0 |
| norway | hordaland county | ceramium pallidum | species | 2 | 0 |
| norway | hordaland county | ceramium secundatum | species | 2 | 0 |
| norway | hordaland county | ceramium shuttleworthianum | species | 1 | 0 |
| norway | hordaland county | ceramium sp. | species | 2 | 0 |
| norway | hordaland county | ceramium sp. csp3 | species | 1 | 0 |
| poland | greater poland province | ceramium tenuicorne | species | 79 | 0 |
| russia | | ceramium kondoi | species | 12 | 0 |
| russia | primorsky krai | ceramium kondoi | species | 9 | 0 |
| saint helena | | ceramium secundatum | species | 4 | 0 |
| slovenia | municipality of piran | ceramium elegans | species | 13991 | 0 |
| south korea | | ceramium boydenii | species | 5 | 0 |
| south korea | | ceramium japonicum | species | 2 | 0 |
| south korea | | ceramium kondoi | species | 27 | 0 |
| south korea | | ceramium paniculatum | species | 2 | 0 |
| south korea | | ceramium sp. ac239 | species | 2 | 0 |
| south korea | | ceramium tenerrimum | species | 2 | 0 |
| south korea | busan city | ceramium japonicum | species | 3 | 0 |
| south korea | gangwon province | ceramium boydenii | species | 1 | 0 |
| south korea | gangwon province | ceramium inkyuii | species | 1 | 0 |
| south korea | gyeonggi province | ceramium inkyuii | species | 1 | 0 |
| south korea | gyeonggi province | ceramium paniculatum | species | 1 | 0 |
| south korea | gyeonggi province | ceramium tenerrimum | species | 617 | 0 |
| south korea | jeju province | ceramium tenerrimum | species | 7 | 0 |
| south korea | jeju province | ceramium tenuissimum | species | 1 | 0 |
| south korea | north gyeongsang province | ceramium inkyuii | species | 1 | 0 |
| south korea | north gyeongsang province | ceramium japonicum | species | 28 | 0 |
| south korea | north gyeongsang province | ceramium tenerrimum | species | 2 | 0 |
| south korea | north jeolla province | ceramium japonicum | species | 9 | 0 |
| south korea | north jeolla province | ceramium kondoi | species | 560 | 0 |
| south korea | south chungcheong province | ceramium japonicum | species | 51 | 0 |
| south korea | south gyeongsang province | ceramium japonicum | species | 67 | 0 |
| south korea | south gyeongsang province | ceramium kondoi | species | 22 | 0 |
| south korea | south jeolla province | ceramium japonicum | species | 114 | 0 |
| spain | | ceramium ciliatum | species | 1 | 0 |
| spain | | ceramium gaditanum | species | 2 | 0 |
| spain | | ceramium strictum | species | 1 | 0 |
| spain | canary islands | ceramium sp. csp2 | species | 36 | 0 |
| spain | canary islands | ceramium sp. tmg-2002-2 | species | 1 | 0 |
| united kingdom | england | ceramium echionotum | species | 1 | 0 |
| united kingdom | northern ireland | ceramium botryocarpum | species | 2 | 0 |
| united kingdom | northern ireland | ceramium secundatum | species | 18 | 0 |
| united kingdom | northern ireland | ceramium sp. csp4.1 | species | 2 | 0 |
| united kingdom | wales | ceramium strictum | species | 1 | 0 |
| united states | | ceramium sp. | species | 1 | 0 |
| united states | | ceramium sp. tmg-2002-1 | species | 1 | 0 |
| united states | alaska | ceramium cimbricum | species | 4 | 0 |
| united states | alaska | ceramium kondoi | species | 11 | 0 |
| united states | alaska | ceramium pacificum | species | 10 | 0 |
| united states | california | ceramium codicola | species | 26 | 0 |
| united states | california | ceramium interruptum | species | 12 | 0 |
| united states | california | ceramium pacificum | species | 4 | 0 |
| united states | california | ceramium sinicola | species | 18 | 0 |
| united states | california | ceramium sp. 1bc | species | 1 | 0 |
| united states | california | ceramium sp. 1cal | species | 3 | 0 |
| united states | california | ceramium sp. 3cal | species | 2 | 0 |
| united states | california | ceramium sungminbooi | species | 1 | 0 |
| united states | connecticut | ceramium virgatum | species | 1 | 0 |
| united states | hawaii | ceramium dumosertum | species | 1 | 0 |
| united states | hawaii | ceramium sp. ac196 | species | 1 | 0 |
| united states | hawaii | ceramium sp. ac198 | species | 2 | 0 |
| united states | maine | ceramium virgatum | species | 31 | 0 |
| united states | massachusetts | ceramium secundatum | species | 1 | 0 |
| united states | massachusetts | ceramium virgatum | species | 20 | 0 |
| united states | new jersey | ceramium sp. csp1.2 | species | 2 | 0 |
| united states | north carolina | ceramium diaphanum | species | 9 | 0 |
| united states | north carolina | ceramium sp. 1 dwf-2013 | species | 2 | 0 |
| united states | north carolina | ceramium sp. 2 dwf-2013 | species | 7 | 0 |
| united states | oregon | ceramium californicum | species | 5 | 0 |
| united states | oregon | ceramium codicola | species | 46 | 0 |
| united states | oregon | ceramium kondoi | species | 6 | 0 |
| united states | oregon | ceramium pacificum | species | 5 | 0 |
| united states | oregon | ceramium sungminbooi | species | 3 | 0 |
| united states | rhode island | ceramium secundatum | species | 42 | 0 |
| united states | rhode island | ceramium virgatum | species | 18 | 0 |
| united states | washington | ceramium codicola | species | 10 | 0 |
| united states | washington | ceramium gardneri | species | 8 | 0 |
| united states | washington | ceramium kondoi | species | 4 | 0 |
| united states | washington | ceramium pacificum | species | 64 | 0 |
| united states | washington | ceramium washingtoniense | species | 1 | 0 |