Need help on some ids

[Don_Jorge]

So first off I’m wondering if these are just clams or something. They have this like predator mouth inside or something so it’s kinda weird.l, then we have a few others

 

[JGT]

First pic is hard to see. Second is ball nem, third looks like a nudibranch.

 

[Rtaylor]

1. First pic is not clear, but a lot of bivalves have siphons if that’s what you mean with the mouth comment
2. Hidden cup coral, I have over a dozen, very cool hitchhikers
3. This pic has coralline and a red macro algae I think

 

[Don_Jorge]

It’s a cluster of some shellfish and the inside goes in and out like a little mouth, best I can do to describe sorry lol

 

[Rtaylor]

Here is a pic of a bivalve with a siphon visible

File:Siphon (mollusc) Unionidae Lamiot Lille 2340.JPG - Wikimedia Commons

commons.m.wikimedia.org

 

[Don_Jorge]

Here is a pic of a bivalve with a siphon visible

File:Siphon (mollusc) Unionidae Lamiot Lille 2340.JPG - Wikimedia Commons

commons.m.wikimedia.org

Mine has like a black inside that horse in and out

 

[JGT]

Could be oysters

 

[Rtaylor]

Mine has like a black inside that horse in and out

Does it kind of look like it’s sticking out a tongue? If so that would be it’s foot/tongue, exactly what it looks like.