| bahamas | | ecteinascidia turbinata | species | 3 | 0 |
| brazil | rio de janeiro | phallusia nigra | species | 6 | 0 |
| chile | | ciona robusta | species | 2 | 0 |
| chile | | corella eumyota | species | 1 | 0 |
| china | | ciona intestinalis | species | 1 | 0 |
| egypt | | ecteinascidia turbinata | species | 1 | 0 |
| egypt | ismailia governorate | ecteinascidia turbinata | species | 2 | 0 |
| france | | ciona intestinalis | species | 1 | 0 |
| france | bretagne region | ascidiella sp. tg-2008 | species | 1 | 0 |
| france | bretagne region | ciona intestinalis | species | 5 | 0 |
| germany | schleswig-holstein | ciona intestinalis | species | 6 | 0 |
| india | | ascidia gemmata | species | 1 | 0 |
| india | | ascidia sydneiensis | species | 4 | 0 |
| india | | ecteinascidia thurstoni | species | 1 | 0 |
| india | | ecteinascidia venui | species | 1 | 0 |
| india | | perophora multiclathrata | species | 10 | 0 |
| india | | phallusia arabica | species | 2 | 0 |
| india | | phallusia fumigata | species | 1 | 0 |
| india | | phallusia mammillata | species | 1 | 0 |
| india | | phallusia nigra | species | 2 | 0 |
| india | | rhodosoma turcicum | species | 2 | 0 |
| india | andaman and nicobar islands | ascidia virginea | species | 1 | 0 |
| india | andaman and nicobar islands | phallusia ingeria | species | 1 | 0 |
| india | karnataka | ecteinascidia venui | species | 1 | 0 |
| india | karnataka | perophora multiclathrata | species | 2 | 0 |
| india | sikkim | phallusia nigra | species | 2 | 0 |
| israel | | ascidia virginea | species | 1 | 0 |
| israel | | phallusia nigra | species | 7 | 0 |
| israel | southern district | ciona robusta | species | 101 | 0 |
| italy | | ciona intestinalis | species | 16 | 0 |
| italy | campania region | ciona intestinalis | species | 102 | 0 |
| italy | liguria region | phallusia fumigata | species | 22 | 0 |
| italy | liguria region | phallusia mammillata | species | 2 | 0 |
| italy | veneto region | ciona intestinalis | species | 1 | 0 |
| japan | | ciona intestinalis | species | 2 | 0 |
| japan | | ciona robusta | species | 3 | 0 |
| japan | | perophora japonica | species | 1 | 0 |
| japan | aichi prefecture | ciona intestinalis | species | 12 | 0 |
| japan | hokkaido prefecture | ascidiella aspersa | species | 16 | 0 |
| japan | hokkaido prefecture | megalodicopia hians | species | 1 | 0 |
| japan | hyogo prefecture | ciona intestinalis | species | 8 | 0 |
| japan | ibaraki prefecture | ciona intestinalis | species | 2 | 0 |
| japan | kanagawa prefecture | ascidia ahodori | species | 2 | 0 |
| japan | kanagawa prefecture | ascidia zara | species | 6 | 0 |
| japan | kanagawa prefecture | ciona intestinalis | species | 8 | 0 |
| japan | kanagawa prefecture | ciona savignyi | species | 4 | 0 |
| japan | kyoto prefecture | ciona robusta | species | 4 | 0 |
| japan | niigata prefecture | ascidiella aspersa | species | 2 | 0 |
| japan | niigata prefecture | ciona savignyi | species | 4 | 0 |
| japan | okayama prefecture | ascidia sydneiensis | species | 2 | 0 |
| japan | okinawa prefecture | phallusia philippinensis | species | 13 | 0 |
| netherlands | | ciona intestinalis | species | 1 | 0 |
| netherlands | zeeland province | ciona intestinalis | species | 1 | 0 |
| new zealand | | ciona intestinalis | species | 1 | 0 |
| new zealand | | ciona savignyi | species | 1 | 0 |
| new zealand | nelson | ciona intestinalis | species | 2 | 0 |
| norway | | ciona intestinalis | species | 1 | 0 |
| panama | bocas del toro province | phallusia nigra | species | 6 | 0 |
| papua new guinea | | dicopia fimbriata | species | 1 | 0 |
| portugal | setubal district | ciona robusta | species | 2 | 0 |
| puerto rico | | ascidia sydneiensis | species | 1 | 0 |
| puerto rico | | ecteinascidia turbinata | species | 2 | 0 |
| puerto rico | | perophora viridis | species | 2 | 0 |
| puerto rico | | phallusia nigra | species | 2 | 0 |
| puerto rico | | rhodosoma turcicum | species | 3 | 0 |
| south korea | | ascidia zara | species | 1 | 0 |
| south korea | | chelyosoma dofleini | species | 1 | 0 |
| south korea | | ciona intestinalis | species | 1 | 0 |
| south korea | | ciona robusta | species | 9 | 0 |
| spain | | ascidiella aspersa | species | 1 | 0 |
| spain | | ecteinascidia herdmanni | species | 1 | 0 |
| spain | | phallusia fumigata | species | 1 | 0 |
| spain | catalonia | ascidiella aspersa | species | 4 | 0 |
| spain | catalonia | ciona robusta | species | 14 | 0 |
| spain | catalonia | perophora viridis | species | 1 | 0 |
| spain | galicia | ciona intestinalis | species | 0 | 3 |
| spain | valencia | ciona intestinalis | species | 1 | 0 |
| united kingdom | england | ascidiella aspersa | species | 24 | 0 |
| united kingdom | england | ciona intestinalis | species | 748 | 1 |
| united kingdom | england | ciona intestinalis b cg-2006 | no rank | 1 | 0 |
| united kingdom | england | corella eumyota | species | 1 | 0 |
| united kingdom | scotland | ciona intestinalis | species | 17 | 0 |
| united states | | ascidia interrupta | species | 2 | 0 |
| united states | | ciona intestinalis | species | 1 | 0 |
| united states | | perophora viridis | species | 1 | 0 |
| united states | california | ascidia ceratodes | species | 18 | 0 |
| united states | california | ascidia zara | species | 3 | 0 |
| united states | california | ascidiella aspersa | species | 10 | 0 |
| united states | california | ciona intestinalis | species | 2 | 0 |
| united states | california | ciona robusta | species | 1 | 0 |
| united states | california | ciona savignyi | species | 18 | 0 |
| united states | california | corella aff. inflata jam-2017 | species | 1 | 0 |
| united states | california | perophora japonica | species | 1 | 0 |
| united states | florida | ascidia virginea | species | 7 | 0 |
| united states | florida | ecteinascidia turbinata | species | 6 | 0 |
| united states | florida | phallusia nigra | species | 52 | 0 |
| united states | maine | ascidiella aspersa | species | 1 | 0 |
| united states | massachusetts | ascidiella aspersa | species | 1 | 0 |
| united states | massachusetts | ciona intestinalis complex sp. b sensu caputi et al. (2007) | species | 2 | 0 |
| united states | north carolina | perophora viridis | species | 10 | 0 |