21 Species in Family Cerianthidae
| Scientific Name | Author | English Name |
|---|---|---|
| Arachnactis albida | Sars, 1846 | |
| Arachnanthus oligopodus | (Cerfontaine, 1891) | |
| Ceriantheomorphe brasiliensis | Carlgen, 1931 | |
| Ceriantheopsis americana | (Verrill, 1862) | Southern cerianthid |
| Cerianthus americanus | unspecified | |
| Cerianthus lloydii | Gosse, 1859 | |
| Cerianthus membranaceus | (Spallanzani, 1784) | Tube dwelling anemone |
| Cerianthus vogti | Danielssen, 1890 | |
| Isodactylactis borealis | Widersten, 1998 | |
| Pachycerianthus aestuarii | (Torrey & Kleeburger, 1909) | |
| Pachycerianthus borealis | (Verrill, 1873) | Northern cerianthid |
| Pachycerianthus delwynae | Carter, 1995 | |
| Pachycerianthus dohrni | (Van Beneden, 1923) | |
| Pachycerianthus fimbriatus | Mcmurrich, 1910 | Tube-dwelling anemone |
| Pachycerianthus insignis | Carlgren, 1951 | |
| Pachycerianthus johnsoni | (Torrey & Kleeburger, 1909) | |
| Pachycerianthus multiplicatus | Carlgren, 1846 | |
| Pachycerianthus nobilis | (Haddon & Shackleton, 1894) | |
| Pachycerianthus schlenzae | Stampar, Morandini & Silveira, 2014 | |
| Pachycerianthus solitarius | (Rapp, 1829) | |
| Synarachnactis brachiolata | (Agassiz, 1862) |