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Thresher sharks are back off the Seacoast—sleek, strange, and swinging nine-foot tails.

As Jaws celebrates its 50th anniversary, Science News explores the vast range of shark sizes, from megaladon to the dwarf lanternshark.

The Common Thresher Shark (Alopias vulpinus) is easily identified by the extended upper lobe of its caudal fin. Even though these sharks can grow up to 20 feet long, much of their length comes ...

More: Fourth thresher shark found frozen off Wellfleet Dusky sharks One of the larger sharks found in New England waters, Dusky sharks aren't too common as we are the northern tip of their range.