Tropical Fish Keeping - Aquarium fish care and resources

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jeffwee559 01-14-2007 01:47 PM

white goo on live rock
i just moved some of my live rock around and noticed a big glob of this white goo on the bottom, what can it be? it looks like it can have something living in it cuz it has a hole in the middle.

caferacermike 01-14-2007 02:03 PM

Sponge or tunicate. Good news, both are difficult and a sign of a good tank.

jeffwee559 01-14-2007 02:50 PM
heres a picture of it

jeffwee559 01-14-2007 02:57 PM

well go here.

caferacermike 01-14-2007 03:01 PM

Yep sponge or tunicate. With the vents it's easier to call it a tunicate. tunicates are basically community sponges.

Ramirezi160 01-22-2007 10:58 AM

Tunicates and sponges are two completely different types of organisms. Tunicates belong to the phylum Urochordata and sponges belong to the phylum Porifera. Neither are necessarily bad for a tank, but if a sponge is exposed to air, it will more than likely die and can really foul up a tank. The picture looks like it could be an encrusting sponge.

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