The Milk-fishes
BODY oblong, compressed, covered with small, firm, adherent scales; lateral line distinct; abdomen broad and flattish; snout depressed; mouth small, anterior, the lower jaw with a small symphyseal tubercle; no teeth; eye with an adipose eyelid; gill membranes broadly united, free from the isthmus; branchiosteglas 4; pseudobranchiae well developed; an accessory branchial organ in a cavity behind the gill cavity; dorsal fin opposite the ventrals; anal shorter than the dorsal; mucous membrane of the oesophagus raised into a spiral fold; intestine with many convolutions; colour silvery.