Anemones belong in the Phylum Cnidaria, related to hard and soft-corals and hydroids. Cnidarians were once called Coelenterates.
Although they have a flower-like form, anemones are efficient meat-eating carnivores, capable of catching fish and small crustaceans by paralyzing them with stinging tentacles and devouring their prey.
Anemones have a hollow central column, capped by a flat oral disc fringed by tentacles armed with stinging nematocysts. The anemone to the right is a Waratah Anemone, Actinea tenebrosa.
Some anemones, such as the Eastern Sand Anemone, O. muscosa to the left, have sticky patches on the column, able to hold sand grains and shell fragments. This may be a form of camouflage.
Although anemones may seem firmly attached to the rocks on which they sit, they are capable of very slow creeping from place to place.
Can think of any other reason why this anemone would be designed to have sand shell fragments stuck to it?
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