Tunicate or seasquirt maybe?

[Humble_Reefer]

Posted to a local group. Not my photo, but I'm curious. Appears to have 3 orifices and a loosely latticed structure. Any ideas?

 

[BloopFish]

Might be a colonial tunicate

 

[elysics]

Looks more like just a very veiny sponge. Colonial tunicates usually have a clear distinction between the individual animals, what you have has smooth transitions between areas instead.

I have got a grey sponge with similar veins