genus sertularia

[Bonnieked]

sessile hydroid that forms feathery colonies

[DennisSt]

Genus Sertularia refers to a category of marine hydroids in the family Sertulariidae. These are small, usually colonial, marine animals that are physically similar to coral. The creatures within this genus are characterized by elongated, tubular structures that form a colony, typically attached to a hard substrate. The hydroids have a polyp stage and their bodies are encased in a hard outer covering, which is different from most other hydroids.