Zoanthus n. : A genus of Actinaria, including numerous species, found mostly in tropical seas. The zooids or polyps resemble small, elongated actinias united together at their bases by fleshy stolons, and thus forming extensive groups. The tentacles are small and bright colored.

Example:


Taxonomy
Zoanthids, Zoanthus, Corals, Palytoxin, polyps, colony, varieties, snails, nudibranchs, fungus, dip, the colony, Aggression, overgrow, Hardiness, specimens, Wild-caught, color morphs.

Defination from the web:
Zoanthus There are three comonly available genera in the aquarium trade: Zoanthids, Palythoa, and Protopalythoa. [edit] Hardiness ... Rule number one when fragging Zoanthus is to WEAR GLOVES and GOGGLES. The potential for poisoning from their palytoxin is high if not careful. ...