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Belikin

New Aquaculture live rock, what is this?

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30 minutes ago, Belikin said:

Oh yeah, it moves if you get close to it. 

Well, it's not a sponge! Is it attached to the rock or just lodged there? It looks like a....sea cucumber...

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10 minutes ago, jservedio said:

Well, it's not a sponge! Is it attached to the rock or just lodged there? It looks like a....sea cucumber...

I'm pretty sure after talking to some others its a tunicate AKA sea squirt.

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1 minute ago, Belikin said:

I'm pretty sure after talking to some others its a tunicate AKA sea squirt.

It could definitely be a tunicate. The easiest way to figure out if it is a tunicate, especially if it isn't transparent, is to look for a second hole. They have an intake siphon and an outlet that their ass is connected to.

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1 hour ago, jservedio said:

It could definitely be a tunicate. The easiest way to figure out if it is a tunicate, especially if it isn't transparent, is to look for a second hole. They have an intake siphon and an outlet that their ass is connected to.

Yep, I was able to get a better look today, and found the outlet. Wonder if it will stay alive for long in a tank?

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39 minutes ago, Belikin said:

Yep, I was able to get a better look today, and found the outlet. Wonder if it will stay alive for long in a tank?

Unfortunately, probably not if you have a newer tank - most of the ones that do well in our tanks are of the colonial type and typically only in older, established tanks. The singular and larger tunicates generally don't do well - there just isn't enough for them to eat in a new tank. They are filter feeders.

 

I've got a few (I think - colonial tunicates and sponges can be hard to differentiate) in my tank, but they are small and of the colonial type:

20190318_165411.thumb.jpg.66945c24986dc8a66ce0cba88342cf42.jpg

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