Any idea what this could be?

[Tlwnd]

Found this in the sump, any idea on what it could be?

 

[TX_REEF]

that's interesting... @ISpeakForTheSeas might have an idea?

 

[Dom]

While it doesn't look like a typical sponge, I'm still going with sponge.

If it is, let it be; it is beneficial to have.

 

[BryanM]

I would also guess sponge, hopefully someone has a definitive answer though.

 

[papercrab]

Looks like some kind of sponge or tunicate colony. Any idea of what it might have come from?

 

[Tlwnd]

Not a clue. I added a few Ricordia, Rhodactis and a Duncan about 6 months ago. I dipped all of them prior to adding them to the tank but maybe something survived on the bases and made its way into the sump.

 

[JTP424]

+1 for the sponge!

 

[StartingATank]

I know lots of people said sponge, but it does slightly look like a crab to me