That is about 4 degs. The preferred set for a longliner targeting porbeagles is 40- 50 deg. Only two sharks in the world have the short ridge on the upper part of the lower tail lobe. They are the porbeagle Lamna nasus and the salmon shark Lamna ditropis . Fork length pounds 9 Feet 550 lbs.
Porbeagles are definitely a cooler water species.
They have been caught by longliners in 32 deg. The IGFA has recently opened up the fly rod category to include porbeagles. In the British Isles the porbeagle is a much sought after big game fish. The porbeagle is a little known shark here in the United States. It is confined mainly to the New England area, with a few getting into New York and New Jersey waters.