Sponge ??

one-fish

Active Member
I have this growing out of LR looks to be semitransparent reddish in color circular thinking it's a sponge seeing more on another rock. From what I know it's harmless but read that some sponges are toxic when dying. Hope the pic turns out 1st time posting a pic..Thx.
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2quills

Well-Known Member
I think just about all sponges have toxic compounds as their natural defense. Protiens and ammino acids are converted into these compounds known as polytheonamides by bacteria that live in symbiosis with the sponge.

I wouldn't worry unless they get out of control. The fact that you can grow them is a good sign things are pretty stable.
 
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