sponge or ? what is it ?

[NanoReefN]

This thing has a mouth that closes and even looks like it moves a little . Its growing under my Daisy polyps.

 

[victor escobar]

that's an ascidian

 

[trinidiver]

yeah, Ascidiacea or other known name is sea squirt

 

[Baboo11]

Looks cool! Congrats on your tank supporting another life form!

 

[NanoReefN]

Sweet !!

 

[SushiGirl]

yeah, Ascidiacea or other known name is sea squirt

also called tunicate.