I would say drum fish but they are freshwater fish. They do have teeth like that and that is def teeth and part of a jaw.

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Pharyngeal teeth. Teeth from a fish's throat. Several species have them. Many rivers empty into the Gulf of Mexico so it is quite likely that it came from a freshwater fish but was carried to a saltwater beach. Anon is probably right - I'm guessing drum.

>>2122913

Those are probably from a black drum. I hate taking the gills out of them because of that plate.

>>2122913
>>2122915

urgh, disgusting to look at. gives me goosebumps and makes the hairs on the back of my neck stand up