The deepest I've ever heard of a sea horse being found was just today off the NC coast at 109 Ft. In fact I was checking to see if that's common when I found this page. According to the ID books they're not usually found deeper than 40 Ft.
no
Yes.
they live in ... the under water
they are cold blooded
Neither. Seahorses live in oceans, and oceans aren't considered running waters.
because they're too fresh for fresh water
Seahorses live in the intertidal zone because they are protected from predators and have access to food in this area. Seahorses are not great swimmers so they tend to stay in shallow water.
seahorses
No they only live far out into the ocean.
seahorses do not live in plants.
No they cannot live in fresh water. They can live in sea water.
Seahorses live in the sea.