How big does an seahorse get?
6 inches long.
well, it all depends. The average height of a full-grown sea horse is 2-8 inches, but some can be smaller, such as the Hippocampus satomiae, a little bigger than a pea, has been found on reefs in Indonesia. or they could be much larger, such as The big-belly seahorse or pot bellied seahorse, Hippocampus abdominalis, is one of the largest seahorse species in the world with a length of up to 35 cm.