Shark, Blue - Prionace glauca
Photo taken aboard Luke Aston’s boat Clare Dragoon with thanks to John SAI
Distinguishing features: The blue shark is a long, slender member of the shark family with long, curving pectoral fins. The upper lobe of the tail fin is also long. It has no spiracle and five gill slits. The back and upper sides are dark blue, fading into a lighter blue on the lower sides and white on the belly.
Size: This shark can grow to lengths of around 3.8 metres in Northern European waters and can weigh up to 160 kg.
Habitat: The blue shark is ocean going and is found in warm and temperate waters throughout the world. It is a seasonal migratory fish in northern waters and rarely comes close to shore. It tends to live in the surface areas. The majority of these northern sharks are female.
Food: Feeds mainly on shoals of pelagic fish such as mackerel, herring and sandeels although they also predate on squid.
Baits: Mackerel are the most effective bait for the blue shark, either live or as a flapper. They respond well to the scent trail from rubby dubby.
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