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Batrachoidiformes: Body usually scaleless (small cycloid scales in some); head large with eyes more dorsal than lateral; mouth large and bordered by premaxilla and maxilla; pore (foramen) in axil of pectoral fin in some; pelvic fins jugular (in front of pectorals), with one spine and two or three soft rays; three pairs of gills; gill membrane broadly joined to isthmus; branchiostegal rays six; four or five pectoral radials; swim bladder present; upper hypurals with peculiar intervertebrallike basal articulation with rest of caudal skeleton; no ribs, epiotics, or intercalars; no pyloric caeca.

Families in this order: