• Coronet -- Most seahorses have a little crown on top of their heads.
• Eyes -- A seahorse's two eyes can move in different directions.
• Fins -- Seahorses have three fins to help them swim. They have a dorsal fin on their back and two pectoral fins on each side of the neck.
• Gills -- They have gills to get oxygen from the water to breathe.
• Tail -- They have a curly tail used mainly to hold on to branches of seaweed.

Swimming motion. Seahorses swim upright, but they are very weak swimmers. The pectoral fins on either side of their head are used for balance. The dorsal fin on their back is used for propulsion. To move forward, they flap their dorsal fin very quickly. To move up or down, the seahorse rolls or unrolls its tail.

Diet and digestion. A seahorse is a predator and eats zooplankton. With its tail holding it in place, it will wait until a small animal swims by, and then the seahorse will suck it in. Seahorses have no teeth and no stomach. They swallow their food whole and then it passes through them very quickly. For this reason, it is necessary that they eat all day long.

Reproduction. The female seahorse lays her eggs in the male's pouch where they are fertilized. The male seahorse takes care of the eggs until they hatch, which takes approximately two to six weeks. The babies look like tiny adult seahorses and are only about 1/4-inch long. The newborns begin eating right after they are born, but the parents do not provide any care for their babies.

Survival. Seahorses don't have very many natural enemies. Most creatures don't find them very appetizing because they are very bony and some have sharp spines. Some do like to eat them though, such as crabs, skates, rays, and sea turtles. Seahorses rely heavily on camouflage for survival. They can change colors within minutes to blend into their surroundings.