Zoantharians are marine invertebrates related to other better-known cnidarians such as jellyfish, sea anemones and corals.

A crab became a snack for a sea predator with “stinging tentacles” on an Oregon shoreline, a photo shows. The crustacean was snagged by a carnivorous giant green anemone at the Seal Rock State ...

At the head of its body is an oval-shaped disk surrounded by tentacles which makes it appear very much like its namesake plant. The tentacles are sensitive and the anemone knows when prey is present.