Taken primarily from Kozloff,
1987, 1996
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| 1a | Polyps with 8 pinnately branched tentacles | Subclass
Alcyonaria (Octocorallia) |
| 1b | Polyps with more than 8 tentacles, these not branched | 2 |
| 2a | With a ring of tentacles around the mouth, as well as on the marginal portion of the disk; inhabiting tubes that consist of discharged nematocysts embedded in a matrix of slippery mucus | Subclass
Ceriantipatharia,
Order Ceriantharia |
| 2b | Without a ring of tentacles around the mouth (all tentacles are on the marginal portion of the disk); not inhabiting tubes that consist of discharged nematocysts embedded in slippery mucus (true anemones and corals) | Subclass
Zoantharia |