Grey reef sharkAML

Carcharhinus amblyrhynchos

Carcharhinus amblyrhynchos ventral head
Carcharhinus amblyrhynchos upper and lower teeth

Characteristic features:

  • Entire posterior edge of caudal fin with wide black border
  • Interdorsal ridge weak or absent
  • First dorsal fin relatively tall, its origin well over pectoral-fin inner margins
  • Snout broadly rounded
  • Upper teeth long, narrowly triangular, with a notch on one edge
  • Lower teeth narrow, upright, edges weakly serrated

Colour:

Dorsal surfaces bronze to greyish, becoming grey after death; a faint white stripe along side of body. Caudal fin with broad black posterior margin; first dorsal fin plain, sometimes with a white tip; other fins with dusky tips. Ventral surfaces almost white.

Size:

Maximum size up to 225 cm TL but rarely above 180 cm TL; birth size 45–64 cm TL.

Distribution:

Widespread in the tropical Indo-west and central Pacific, from south eastern Africa to the central Pacific islands.

Habitat:

Among the most common shark species found on coral reefs; found mostly near deep drop-offs and reef passes. Found to at least 280 meters depth.

Biology:

Feeds primarily on small bony fish, but also cephalopods and crustaceans. Length at maturity is 130–140 cm TL for both sexes. Age at maturity is around 6 years and 9 years for females and males respectively. Reproductive mode is viviparous with yolk-sac placenta. females give birth to 1–6 pups after a 12–14 months gestation period. Maximum age reported as at least 15 years in Papua New Guinea. Becomes aggressive when provoked and can be potentially dangerous to humans.

Indonesian fisheries:

Caught by shark longline and inshore gillnet fisheries, and possibly adversely affected by dynamite fishing. Utilised for fins, meat, skin and cartilage.

Similar species:

Carcharhinus albimarginatus
Silvertip shark
Carcharhinus albimarginatus
Carcharhinus albimarginatus differs in having a more robust body (vs. more slender) and a moderately short snout (vs. snout moderately long).

External links:

FishBase
The IUCN Red List of Threatened SpeciesTM