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school shark
''Galeorhinus galeus'' is a houndshark of the family Triakidae, and the only member of the genus ''Galeorhinus''. Common names include school shark, tope shark, soupfin shark, and snapper shark. It is found worldwide in temperate seas at depths down to about . It can grow to a length nearly long. It feeds both in mid-water and near the seabed, and its reproduction is ovoviviparous. This shark is caught in fisheries for its flesh, its fins, and its liver, which has a very high vitamin A content. The IUCN has classified this species as "Vulnerable" in its Red List of Threatened Species.
==Description==
The school shark is a small, shallow-bodied shark with an elongated snout. The large mouth is crescent-shaped and the teeth are of a similar size and shape in both jaws. They are triangular-shaped, small and flat, set at an oblique angle facing backwards, serrated and with a notch. The spiracles are small. The first dorsal fin is triangular with a straight leading edge and is set just behind the pectoral fins. The second dorsal fin is about the same size as the anal fin and is set immediately above it. The terminal lobe of the caudal fin has a notch in it and is as long as the rest of the fin. School sharks are dark bluish grey on the upper (dorsal) surface and white on their bellies (ventral surface). Juveniles have black markings on their fins. Mature sharks range from for males and for females.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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