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Joker Coral

Euphyllia glabrescens


A type of stony coral, the Joker Coral is a reef-building species whose polyps have tentacles that are always extended (except when severely disturbe). The polyps excrete a skeleton and form colonies that can extend up to a meter in diameter.


E. glabrescens can be found in a wide range of reef environments, at depths of 1 to 35m.


This coral can be easily mistaken to be a sea anemone or a mushroom coral. The 4th photo illustrates this -- the tentacles look very much like those of sea anemones', and the coral even hosts an anemone shrimp! The first 3 photos are of one colony, and the 4th photo is of another, taken at a different site.

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Blogie 8 years ago

Thanks, Maria! :)

Maria dB
Maria dB 8 years ago

another superb spotting, Blogie!

Blogie 8 years ago

Thanks, Gerardo and Leuba! :)

Gerardo Aizpuru
Gerardo Aizpuru 8 years ago

Very cool great series Blogie it looks just like an anemone :)

Leuba Ridgway
Leuba Ridgway 8 years ago

very interesting, Blogie - thanks !

Blogie 8 years ago

I know right? But I couldn't find any links explaining why it has that name. Maybe because it tricks you into thinking that it's a sea anemone...? :D

Funny name. lol!

Spotted by

Davao Del Norte, Philippines

Spotted on Aug 18, 2012
Submitted on Sep 2, 2012

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