| Identifying features: |
The body of the common thresher shark is moderately
elongate. The snout is rather short, and the mouth crescent shaped. The
first dorsal fin is large, and located midway between the pectoral and ventral
fins. The second dorsal and anal fins are very small. The tail is distinctive
since it is very long, almost as long as the rest of the body. The coloration
may vary from brownish gray, bluish or blackish above to silvery, bluish
or golden below. The dorsal, pectoral and ventral fins are blackish and
sometimes the pectoral and ventral fins have a white dot in the lip.
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