Deania calcea (Birdbeak dogfish)
As the common names suggest, the snout of the birdbeak dogfish is extremely long, it also has no anal fin and one dorsal fin and it has very compressed cutting teeth in both jaws.
The species also grows to be a maximum length of 1.22m and has a grey-brown colouration.
D. calcea can normally be found on or near the bottom of the continental slope and abyssal plain in depths ranging from 70 to 1,450m however their diet of fish, cephalopods and crusteceans suggests that they may feed at some height above the bottom which could be what reduces their vulnerability to trawling gear, there also seems to be some sex segregation by depth.
The diet of the birdbeak dogfish consists of Cephalopods, Fish, Crusteceans and Myctophids, ageing surveys from the north atlantic suggests that males mature at 17 and females mature at 25 years and both sexes have a life span of 35 years.
D. calcea is an ovoviviparous species meaning that it bears live young and it often has a litter of 1-17 pups which are 30cm long and the gestation period of this species is unknown
Scientific name: Deania calcea
Common names: Birdbeak dogfish, Brier shark, Shovelnose dogfish
Size: Between 1.11 and 1.22m long
IUCN Redlist Status: Least Concern
This species has a wide yet patchy distribution being found in the eastern Atlantic from Iceland to south Africa excluding the Mediterranean, the eastern pacific from Chile and Peru to Japan and new Zealand and Australia between Coffs Harbour and Green Head including Tasmania.
The major threat to the birdbeak dogfish is fisheries where it is taken by trawl, hook and gillnet gear as both bycatch and as a target species for its liver oil and flesh.
2002 regulations in the South East Trawl fishery in Australia prohibit the landings of livers unless the accompanying carcass is also landed.