Entacmaea quadricolor   (Leuckart & Ruppel)  1828 (Sea Anemone)
Organism information awaits expert curation
Class: Anthozoa

Image copyrights: Adam Petrusek

Color: Column usually brown, sometimes reddish or greenish; gradually flared from small pedal disc. Oral disc same brown color as tentacles. Tentacles can collapse when disturbed, appear gray-green.

Each long (to 100 mm) brown tentacle usually with bulb at or somewhat below end; tip of tentacle red (rarely blue), equator of bulb white. Bulb seems to be related to presence of fish, and can disappear; tentacle lacking a bulb has white ring where equator would form. Tentacles without bulbs are blunt-ended. As a rule, in shallow water (e.g. on tops of reefs) polyps small (oral disc diameter 50 mm), clustered together in crevices or adjacent on coral branches, so that tentacles are confluent, forming extensive field; in deep water (e.g. on reef slopes) polyps solitary, large (to 400 mm diameter), with base anchored in deep hole. Animal commonly attached deeply in crevice or hole so that only emergent tentacles visible. Column without verrucae.

Found in association with anemone fishes like Amphiprion bicinctus, Amphiprion clarkii, Amphiprion ephippium, Amphiprion frenatus, Amphiprion melanopus and Premnas biaculeatus.

The most numerous host actinian, widespread geographically and abundant locally.

Synonym (s)
Gyrostoma adherens (Ehrenberg) 1834
Gyrostoma haddoni Lager 1911
Gyrostoma hertwigi Kwietniewski 1897

Common Name (s)
• Bulb Tentacle Sea Anemone (English)
Economic Importance and Threats

Habitat:  Reef Associated


• Andaman and Nicobar Islands INDIA (Record: 2000-2005)

Literature Source(s)
  • Madhu, R and Madhu, K (2007) Occurrence of anemonefishes and host sea anemones in Andaman and Nicobar Islands Journal of the Marine Biological Association of India The Marine Biological Association of India, Cochin 49(2) 118-126 Available at - NIO, Goa
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at - http://www.marinespecies.org
  • Fautin, DG and Allen, GR (1992) Sea anemones Field guide to anemone fishes and their host sea anemones Available at - http://www.nhm.ku.edu/inverts/ebooks/intro.html
  • Actiniaria.com Available at - http://actiniaria.com/

Page last updated on:2009-06-17

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