Seahorses especially like to live in seagrass. To keep from being swept away by the current, seahorses use their tales to wrap around the nearby plants. Their tails are specially made by grasping. Also seahorses have swivel eyes so they can watch their prey without moving. Seahorses might mistake small air bubbles for food, and if they eat air bubbles they will get very, very sick or die.
Seahorses get their prey by a tongue that shoots out of their snout.
The body of seahorses is encased in bony ring like plates studded with spines. The shape of them blend in with the ocean plants. Also they have what I think is a very clever camouflage. Because they simply change to the color of the plants around them. They can change to a dark gray or black to a bright purple or yellow.