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lucky_shamrock
October 22nd, 2008, 05:03 PM
Not sure what this is? It appears to be inside a rock with a case around it. The body is black and upon close inspection it looks to have projections on its head like that of a snail? It also releases a stringy web that just floats in the current. Does anyone know what this is, and if its harmful/good?

In the picture you can clearly see the contrast of the case against the rock. Thanks for the help.

mark0933
October 22nd, 2008, 06:52 PM
Look up vermatid snail. harmless, but send out a mucus net when feeding