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Batrachoididae(toadfish; superorder Paracanthopterygii, order Batrachoidiformes) A fairly large family of bottom-dwelling, inshore marine fish of tropical and subtropical waters. They have a wide (toad-like) mouth, a large head with dorsally positioned eyes, a short, stout body, and small gill openings. Some species can produce underwater sounds by means of special muscles acting on the wall of the swim-bladder. There are about 55 species.