Rays are a type of fish. They are very flat and have no bones, only cartilage. Rays are closely related to sharks and live in seas all over the world.
Stingrays are rays have spines on their tail which can poison other animals when stung. Some rays have long, whip-like tails, other species have short tails. Some rays have a series of thorns on their body as a defense against predators. The color variation among rays is huge; color even varies from male to female in some species.
The smallest ray is the Short-nose electric ray, which is the size of a pancake; it is only 4 inches (10 cm) across and weighs about 1 pound (0.5 kg). The biggest ray is the Manta ray which is over 22 feet (6.7 m) wide and weighs many tons (thousands of pounds).