If its salt, it appears to be (maybe this is just slang term for the word you found) an oyster toad. can get up to 2 ft. Dont put your fingers in its mouth if thats what it is!
also known as oyster toadfish, oyster cracker, toadfish, goby(might be another species,) few other names...
Its a dirty dirty mutt of the ocean, which is pretty neat for an aqarium. I get them in crab traps, 20"+, pretty scary. Got some nasty teeth, strong bite, and huge jaw. hence the names...