Shortspine Spurdog Shark
Scientific name.......Squalus Mitsukurii
Other common names.......Shortspine spiny dogfish, greeneye spiny
The shortspine spurdog shark is a fairly slender dogfish. Dorsal
fins with dusky tips and area of posterior caudal notch dusky.
Pectoral, pelvic, and caudal fins with white posterior margins.
There head is broad, snout relatively long and broad, large medial
barbel on anterior nasal flaps. Pectoral fins with shallowly concave
posterior margins and narrowly rounded rear tips. First dorsal fin
relatively high, origin over or just behind pectoral bases; first
dorsal spine fairly stout and short ( much less than fin base ),
origin over pectoral inner margins.
Males mature at (18.5 to 33.4 ) inches, females mature at ( 19.6 to
38.3 ) and can reach to a maximum length of 49.2 inches. Pups are
born at ( 8.2 to 11.8 inches ).
They have oblique-cusped cutting teeth in both jaws.
The dorsal part of the body is gray or gray-brown, and the ventral
surface paler , no white spots on the side of the body. The upper
portion of the dorsal fin is darker. The eyes are green.
These are powerful predators on bony fishes and invertebrates.
Often in large aggregations or schools. Some sexual segregation by
depth or latitude.
Apparently extensive, patchy, but may be a species complex. Found on
continental and insular shelves and upper slopes, submarine ridges
and seamounts on or near bottom, in depths from (13 to 3,129.9 feet
Ovoviviparous, giving birth to 2 to 15 pups per litter ( increasing
with size of mother, varying regionally ) after two year gestation.
No data found
Extremely vulnerable to rapid depletion by fisheries, one population