Sharks and rays have skeletons made of cartilage rather than bone. They have small hard scales, which gives their skin a sandpaper feel to the the touch.

Nurse Shark

Nurse Shark
While most sharks have lost their ability to pump water over through their gills and must remain in motion throughout their lives, the nurse shark is one of two species of sharks that has retained this ability and can lie at rest . The other species with this ability is the lemon shark.

Nurse sharks mostly eat marine invertebrates such as lobsters, shrimp and sea urchins. They capture their prey by their ability to create a strong suction through their small mouths and large throat cavities, which has led to their name, "nurse sharks."

Lemon Shark

Lemon Shark
Lemon sharks get their name because many of them have a yellowish color. Like nurse sharks, they do not have to remain in motion to pass water through their gills

Black Tip Shark

Black Tip Sharks
Black tip sharks are so-named because of the black coloring on the tops of their fins.