moralcoral

There are a whole lot of animals in this phot, barnacles and two species of gastropod, the bigger blacker snail is a topshell, and the smaller looks to be a littorinid, for the barnicle you need to be able to see inside the cup to ID it properly.

Dunno so hard to tell, how deep were these ridges??

Strigosa has wider ridges, see http://www.arkive.org/symmetrical-brain-... this looks more like phrygia, what do you think?

Dont think its Diploria labyrinthyformis as the ridges run more paralel together where as these are independent of each other

Definately not Acropora Palmata, A.palmata is an endangered carribean reef species, to be honest im not even sure if this is a coral, it could be a sponge as their are several that grow like this and no hard corals that sprint to mind, can you tell me did the lobes weft around with the current, there is a mediteranean coral guide http://oceana.org/sites/default/files/re... ill check through the species when i have a bit of time and see if i can ID it

Yep retract that id agree with your annularis, the polyps look about right from comparison with the soft corals and gorgonians surrounding and the encrusting nature, id say it was a good guess, were you snorkelling?

Oh and thanks nigel.brennan for that extra info!!

Thank guys, i have about 100 photos from when i spotted this and a video so i will try to upload them later =)

Amazing creatures but pretty terrifying knowing what they can do!!

Does anyone know if there is a similar species in indonesia, i found one once but can find no reference to it, the same as this deep purple/grey in colour with a reddish ring amount the neck

Nice Spot!! you should update the species name now its been identified =)