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Cartilaginous fish have entirely cartilaginous endoskeletons, meaning their skeletons are made from cartilage. They also have strong jaws, paired appendages, well-developed sense organs, and hunt using a system known as the lateral-line system, which uses vibrations to recognize prey. They can have placoid scales or be naked, and they do not have a swim bladder. They have a dorsal nerve cord that leads to a distinct brain, and they have a notochord.

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15y ago

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