Sliteye sharkCLD

Loxodon macloti

Loxodon macrorhinus upper and lower teeth

Characteristic features:

  • Eyes large, with distinct notch on their posterior edge
  • Second dorsal-fin origin over anal-fin insertion
  • First dorsal-fin upright, base short (its length 2 – 3 times in distance between pectoral and pelvic fins)
  • Preanal ridges very long, equal to length of anal-fin base
  • Snout very long and parabolic
  • Upper and lower teeth with smooth-edged, narrowly triangular and oblique cusps

Colour:

Dorsal surfaces bronze to greyish. Pectoral, pelvic and lower caudal fins with pale tips. Ventral surfaces almost white.

Size:

Maximum size up to 99 cm TL; birth size 40 – 55 cm TL.

Distribution:

Found in the tropical and subtropical Indo-West Pacific, from south-eastern Africa to Papua New Guinea and northwards to southern Japan.

Habitat:

Found over coastal and continental shelves in clear water, from 7 – 100 meters depth.

Biology:

Feeds primarily on small bony fish (particularly anchovies), crustacean and cephalopods. Length at maturity is 66 – 79 and 62 – 82 for females and males respectively. Age at maturity is 1.4 and 1.9 years for females and males respectively. Females display a viviparous with yolk-sac placenta reproductive mode and produce 2 – 4 pups. In north-eastern Australia females give birth each December or January after a 9 – 12 month gestation. Size at birth varies regionally (e.g. 54 – 55 cm TL in Indonesia vs. 40 – 43 cm TL in northern Australia). Maximum age reported as at least 9 and 7 years for females and males respectively.

Indonesian fisheries:

Caught commonly by inshore demersal gillnet fisheries. Utilised for its fins and meat, but is of limited value due to its small size.

Similar species:

Rhizoprionodon
Sharpnose shark
Rhizoprionodon taylori
Rhizoprionodon differ in having an anal fin much larger than second dorsal fin (vs. second dorsal fin and anal fin similarly sized) and an anal-fin posterior margin that is almost straight (vs. deeply notched).

External links:

FishBase
The IUCN Red List of Threatened SpeciesTM