dcsimg

Diagnostic Description

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Low inter-dorsal ridge present (Ref.9997). Dark grey above, light below, fins plain or with slightly dusky tips (Ref. 9997).
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Recorder
Cristina V. Garilao
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Life Cycle

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Viviparous, with a yolk sac placenta (Ref. 244). 6 to 16 young born at 60-80 cm (Ref. 26346). Distinct pairing with embrace (Ref. 205).
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Cristina V. Garilao
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Morphology

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Dorsal spines (total): 0; Dorsal soft rays (total): 0; Analspines: 0; Analsoft rays: 0
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Cristina V. Garilao
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Trophic Strategy

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Occurs on the continental shelf (Ref. 75154). An ontogenetic change in diet occurs as size increases. They consume a smaller proportion of teleosts and more elasmobranchs with increasing size (Ref. 26464).
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Recorder
Pascualita Sa-a
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Biology

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A common but habitat-limited tropical shark found close inshore to well as offshore near or on insular or continental shelves (Ref. 244). Prefers clear water with coral and rocky bottoms (Ref. 244). Although a coastal pelagic species, it is capable of crossing considerable distances of open ocean between islands (at least 50 km) (Ref. 244). Juveniles restricted to shallower water, in 25 m or less (Ref. 244; 37816). Found in superficial aggregations (Ref. 244). Tends to feed near the bottom but may take bait from the surface (Ref. 5485). Feeds mainly on bottom fishes, also squid and octopi (Ref. 244). In the Galapagos Is. it preys on sea lions and marine iguanas (Ref. 28023). Inquisitive and sometimes aggressive, displaying a 'hunch' position ( arched back, raised head and lowered caudal and pectoral fins, while twisting and rolling) near divers that may be followed by biting (Ref. 58085). Viviparous (Ref. 50449). 6 to 16 young of 57 to 80 cm are born per litter (Ref. 1602).
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Recorder
Kent E. Carpenter
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Importance

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fisheries: minor commercial; price category: medium; price reliability: very questionable: based on ex-vessel price for species in this family
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Recorder
Kent E. Carpenter
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