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The roughtail catshark or marbled catshark (Galeus arae) is a common species of deepwater catshark, belonguing to the family Pentanchidae.It is found at a depth of 36–702 m (118–2,303 ft) in the northwestern Atlantic Ocean, the Gulf of Mexico, and the Caribbean Sea, from North Carolina to Costa Rica.
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The bonnethead (Sphyrna tiburo), also called a bonnet shark or shovelhead, [3] is a small member of the hammerhead shark genus Sphyrna, and part of the family Sphyrnidae.It is an abundant species in the littoral zone of the North Atlantic and the Gulf of Mexico, is the only shark species known to display sexual dimorphism in the morphology of the head, and is the only shark species known to be ...
The shark has two kinds of teeth. Those in the mandible (lower jaw) are thinner with a serrated tip. Between 13 and 15 teeth are on either side of the jaw. The teeth in the upper jaw are triangular, but much larger and wider with entirely serrated edges—14 or 15 occur along each side.
The Port Jackson shark is a nocturnal species which peaks in activity during the late evening hours before midnight and decreases in activity before sunrise. [2] A study showed that captive and wild individuals displayed similar movement patterns and the sharks' movements were affected by time of day, sex, and sex-specific migrational behaviour.
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The kitefin shark, the largest luminous vertebrate on record, [3] has a slender body with a very short, blunt snout, large eyes, and thick lips. Its teeth are highly differentiated between the upper and lower jaws, with the upper teeth small and narrow and the lower teeth large, triangular, and serrated.