Male and female lined seahorse mated pair interacting
Seahorses are really interesting for a wide variety of reasons, but not least because they can be seen doing things like this. Mated pairs will rest next to each other, wrap tails around each other, sway together, and bump gently into each other. It looks almost tender, and it’s definitely not an attempt at mating. Really, it looks like affection.
A master of disguise, the pygmy seahorse (Hippocampus bargibanti) grows to only 2 cm in length and matches the gorgonian coral that it lives on. The pygmy seahorse is so successful at hiding that it was not discovered until its home was being studied in a lab.