They are covered with bony plates, not scales.
Their heads look a bit like a horse's head.
The dad carries the eggs in a pocket on his belly.
The eggs hatch inside the pocket, then swim away.
Habitat and Distribution (where they are found)
Seahorses are found in the warmer waters of the world, generally in shallower waters near the coastline.
Size
There are about 35 different kinds of seahorse as far as we know. They range in size from less than a centimetre in length to about 30 centimetres.