Hexacorals; Hexacorallia

The Hexacorals are all based on a corallum with a 6 tentacular structure – hence the name ha, ha! But it’s still not easy to see any initial similarity between, say, a Magnificent Sea Anemone and a Porites Hard Coral.
Ultimately it’s all an issue of scale and proportion…

Fascinating vari-tentacled beasties, from short to long, big to small, and living in a variety of different environments. (10 Galleries)

Both have a strong but flexible skeleton based on keratin. Hosts to some cool prawns and other fine critturs. (2 Galleries)

Cerianthids are solitary tube dwellers, differing from real sea anemones by having extra tentacles around the mouth. They live mostly buried in the sand and when disturbed they quickly retract.

Corallimorpharians are best described as sort of half-way between a sea anemone and a true hexacoral.

Hard corals come in a massive variety of shapes and sizes, but they all have a hard calcium carbonate exoskeleton. (3 Albums, 9 Galleries)

They are small and colonial, they incorporate sand into their body structure, and they possess 2 distinct rows of tentacles.