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What are the eating habits of sand dollars?

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A unique behaviour of sand dollars Dendraster excentricus is their propensity to sit in the sand with their anterior ends buried. This exposes the feeding surface to the water currents. Sand dollars have their mouth and anus on the same surface, called the oral surface. read more

In their sandy seafloor habitat, sand dollars use their fuzzy spines, aided by tiny hairs (cilia), to ferry food particles along their bodies to a central mouth on their bottom side. read more

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Haddon's carpet anemone (Stichodactyla haddoni) eating a ...
Source: flickr.com