Their skin is composed of dermal denticles, and one extinct species of this animal was called the Megalodon.
This animal has Leydig's organ, and the four compartments of its heart are arranged in an s shape. One type of this animal has a cephalofoil that enhances the sensitivity of their ampullae of Lorenzini, which allow them to detect electrical signals in seawater. Most species of this animal exhibit ovoviviparity, and they breathe through ram ventilation. Their skin is composed of dermal denticles, and one extinct species of this animal was called the Megalodon. For 10 points, name these cartilaginous fish, types of which include the hammerhead and great white.
This animal has Leydig's organ, and the four compartments of its heart are arranged in an s shape.
sharks