Sponge or tunicate?

[cruiser]

After taking a bunch of pictures Thanksgiving in the Caribbean and labeling all these things sponges, I realized they may be tunicates.

Didn't think to touch them and see if they respond, meaning they'd be tunicates. In fact, I was a good scuba diver and didn't touch them at all. Although I have touched barrel sponges before and they're rough like sandpaper.

Does anyone know what these might be?

 

[seaducer]

That looks like a sponge to me. All the tunicates I have seen were fairly small. But I am far from up on that subject.

 

[knotical]

They look like sponges to me also. With tunicates, you can usually see both the incurrent and excurrent siphons.

 

[Walter]

Your labels are correct. Those are sponges,