A slender, elongate fish, the blue shark is easily distinguished by its long pectoral fins, pointed snout and bright coloration. It feeds on a range of surface-dwelling fish, such as mackerel, herring and pilchard, and on squid and waste thrown from fishing boats. Females give birth to live young, and litters of as many as 50 to 60 at a time have been reported.
Blue sharks make regular migrations to warmer waters in the winter months.
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