Hidden gems: pygmy seahorses' beautiful camouflage

In the search for interesting behaviors and traits that help species survive and reproduce successfully, to improve their biological fitness, seahorses seem to come up frequently!

These traits get crazier with the pygmy seahorse. These little guys have a single gill that opens on the back of their head (all other seahorses have a pair of gill openings either side of the head) and the young develop within the male's trunk, rather than a pouch on the tail

Residents of the western Pacific Ocean, pygmy seahorses are usually less than 2 cm long and thus rely on perfect camouflage to survive.  So here's a question:

Do they search for a coral that matches their color, or do they change their color to match the coral?

Find out in this video!