The family Pseudotriakidae includes relatively little-known species of sharks that dwell in extreme depths in oceans around the globe. They can be small (56 cm) to large-bodied (295 cm) with narrowly-rounded heads and more-or-less elongated bell-shaped snouts. Their eyes are cat-like with rudimentary nictitating eyelids, and their coloration is unpatterned grey to brown or blackish. Pseudotriakidae are not catsharks. That’s a different family altogether. Although Pseudotriakis microdon can get up to 295 cm in length, it has very small teeth the size of grains of sand.
Profile Species: Pseudotriakis microdon (False catshark)
Distribution: Patchy world-wide (except, so far, South Atlantic or eastern Pacific) between 100 to 1890 meters deep.
Habitat: Deep-water seabed on continental and insular slopes, occasionally near continential shelves and shallower waters in submarine canyons. Have been observed in the water column.
Behaviour: Indicatively sluggish and slow moving. Virtually neutrally buoyant.
Biology: Viviparous and apparently oophagous. One to two pups survive in utero cannibalism. They are estimated to have 20,000 oocytes (eggs) per ovary, but only one pup per uterus! Talk about putting all your eggs in one basket!
Diet: Fish including elasmobranchs, etc… as well as crabs.
*Brought to you by Sharks of the World, 2014.