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Originally posted by fade2black
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Hi,
However, I was shown last week that in Sprungs new invertebrate book that they eat corals.
Well... maybe. But... consider the source of the information.
I consider it dubious at best.
There are presumably at least a couple of species of similar appearing little stars. There are a few reports of one variety which eat zoanthids and perhaps some soft corals.
Most reports of them indicate they are harmless, and as you indicate algae eaters or surface detritus eaters.
So... watch them. If you see them actively eating a coral or such, then go on a safari to remove them. If not, leave them be and you have something else to help eat detritus and keep the glass clean.