What is this guys??

[Elite]

It's very hard and the "mouths" close when touch. I tried to use toothbrush to remove it but didn't even leave a scratch..

 

[mbbuna]

it looks like a tunicate to me. i would leave it be

 

[Elite]

Thanks Chris&Bard
Will this thing get bigger??

 

[mbbuna]

thats hard to say, i dont think it will get much bigger then it is

 

[Elite]

Cool.. Thanks

 

[FEEDERFISH]

Just a filter feeder, one end is input the other is output