I had some tunicates that looked kind of like that. They'll feel more like jelly if you touch them. A sponge feels like...well...a sponge. I wouldn't go poking at it to figure it out. Just enjoy it and don't worry when it dies off. Things like that tend to come and go in our reefs.
My sump was full of those when I was running my tank in Alaska. They lasted for 2 years or so. I've rarely seen tunicates last more than a month or less. Enjoy them!
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.