About 35 species of seahorses occur worldwide. Seahorses are found in temperate and tropical waters. Hippocampus erectus live in the Caribbean region of the Western Atlantic. The common seahorse Hippocampus guttulatus lives in the Mediterranean Sea and warm areas of the Atlantic. The yellow seahorse Hippocampus kuda lives in the Indo-Pacific.
Seahorses are well camouflaged among the eelgrasses and seaweeds in which they make their homes.
A seahorse often moors itself in the water by curling its prehensile tail around seagrasses and coral branches. The seahorse's small mouth, located at the end of its narrow tubelike snout, sucks up tiny plankton and fish larvae. Seahorses swim upright. Pectoral fins on the sides and a small dorsal fin on the back of a seahorses's body wave rapidly to move the seahorse through the water. A female seahorse deposits 100 or more eggs into the pouch on the male's abdomen.