Anatomy: Seahorses have a long, horse-like head (hence their name) and a curled tail. Seahorses range in size from under a centimeter long (Pygmy Seahorses) to about 1 foot (30 cm) long.

Reproduction: The female seahorse produces eggs, but they are held inside the male's body until they hatch; he is pregnant for about 40 to 50 days. The sea horse is the only animal in which the father is pregnant.

Classification: Kingdom: Animalia (animals), Phylum: Chordata, Class: Osteichthyes (bony fish), Order: Gasterosteiformes (armored, small-mouthed fish), Family: Syngnathidae (pipe fish), Genus: Hippocampus (meaning "horse sea monster" in Greek), and many species.