Bull Shark in the Ichthyology Collection

January 11, 2024 • by Nicole Elmer
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Notice the small black dots on the shark’s snout, which are gel-filled pits, called ampullae of Lorenzini. They are used in sensing the electric field of its prey. Notice the gel being exuded from the pits.

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This groove in front of the caudal fin is called the precaudal pit. It and the free rear tip to the dorsal fin, also shown here, likely improve swimming efficiency.

claspers

The presence of claspers indicates that this specimen is a young male. Close up of one of the claspers, which are used in mating, shows the groove that sperm can travel down into the female’s cloaca.

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