Why is the cartilaginous structure of the viper dogfish pliable?
Answer
To withstand immense pressure
The viper dogfish possesses a cartilaginous structure that is less calcified and more pliable than that of its shallower-dwelling shark relatives. This structural composition is an essential evolutionary adaptation that allows the shark to withstand the crushing, sustained high pressure found in the bathypelagic zone. This pliable body, however, is prone to severe barotrauma when the fish is brought to the surface, complicating scientific efforts to study intact specimens.
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