Aww... It’s a cute baby dragon. It hatched with fins instead of legs and did not seem to react well in freshwater, so you placed it in the nearby ocean.
Young dragons are relatively defenseless. They are born with relatively soft scales, which are shed and replaced with harder ones as the hatchling matures. Once a hatchling’s wings grow in, it marks the beginning of maturation. At this point they are often capable of hunting on their own and are usually left alone by their mother.