JoelATX Posted July 8, 2014 Share Posted July 8, 2014 Not a true emergency, but if they are something unusual I'd try and save them. I'm tearing down the old tank. For a year or so I've thought they were some sort of black sponge. But now that the water is drained they are MUCH more fleshy. I'll try and keep some water on them for a while... Link to comment Share on other sites More sharing options...
bige Posted July 8, 2014 Share Posted July 8, 2014 Maybe a sea squirt? Link to comment Share on other sites More sharing options...
sethsolomon Posted July 8, 2014 Share Posted July 8, 2014 Looks like black sponge. Rub your under arm against it. and if it starts itching its a sponge. (If you have allergies to things like bees or peanut butter don't do this, it might end up worse than just itching. ) Link to comment Share on other sites More sharing options...
Wade Posted July 12, 2014 Share Posted July 12, 2014 I had that on some of my rock at one point. I never really knew what it was, but it didn't seem to bother anything. Does it feel solid like rubber? Link to comment Share on other sites More sharing options...
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