Black snail ID please

[Brisk]

Hi. Found this black snail this morning on the glass. What snail is this and is it good/bad?

 

[ISpeakForTheSeas]

Hi. Found this black snail this morning on the glass. What snail is this and is it good/bad?

Probably a juvenile Horse Conch:

It’s important to note with horse conches that 1) they’re not actually conches - they’re very large predatory snails, and 2) they can grow to two feet in length.

The snail is likely a young horse conch - these are actually massive, predatory snails (they're really cool, but they will eat your other snails, clams, etc. - basically any gastropods would be in danger). The red foot is an incredibly distinctive feature, and the only other snails I know of from Florida with red feet (Peristernia spp.) are also predatory (though these guys are much smaller than horse conchs). So, even if the snails are not horse conchs (which they most likely are), you still probably wouldn't want them in your tank. They could make a really interesting addition to a sump or a predatory snail tank dedicated to keeping them though.

Edit: I meant to say mollusks, not gastropods (though gastropods are a kind of mollusk).

 

[Brisk]

Probably a juvenile Horse Conch:

Thank you! Do they go after copepods?

 

[ISpeakForTheSeas]

Thank you! Do they go after copepods?

I wouldn't expect them to at all, no.