Sargassum pipefish, relatives of seahorses, are masters of camouflage, resembling the seaweed they inhabit. These fish are pelagic, living in the open ocean attached to sargassum, and are found in the ...

(CNN) — Pygmy seahorses, about the size of a fingernail, are some of the smallest vertebrates in the world. First discovered in 1969, little was known about the creatures. But in the early 2000s, ...