There are about two hundred long, translucent tentacles ringed with whorls and spirals formed by groups of cnidocytes.

The sea anemone benefits from this and the algae have a safe lodging free from the likelihood of predation.

It is found on reefs and on soft substrates such as coral rubble or sand at depths down to about 40 metres (130 ft).

[5] Predators on the ringed anemone include starfish, nudibranchs and sea spiders such as (Pigrogromitus timsanus).

These include Ancylomenes pedersoni and the spotted cleaner shrimp (Periclimenes yucatanicus) which live close to it or among its tentacles.

They invite fish to approach by lashing their white antennae, relying on the anemone to keep them safe from attack.