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Squaliformes
| Squaliformes | ||||||||
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Squalidae[?] (dogfish sharks) Centrophoridae (gulper sharks) Dalatiidae[?] (sleeper sharks) Echinorhinidae[?] (bramble sharks) |
Squaliformes is an order of sharks that includes the dogfish sharks[?] and others, about 80 species in four families.
Members of the order have two dorsal fins[?], no anal fin[?], and no nictitating membrane[?]. They have five gill slits[?].
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