Seahorse is a name given to about 54 different species of small marine fishes in the genus Hippocampus. Seahorses get their name because their head resembles that of a horse. They also have segmented bony armor, an upright posture and a curled prehensile tail. Seahorses are found in shallow tropical and temperate waters throughout the world, and live in sheltered areas such as seagrass beds, estuaries, coral reefs, or mangroves. They range in size from 0.6 to 14.0 inches (1.5 to 35.5 centimeters).