Dolphin with feet are unusual, but I imagine they would be pretty soft. Probably pretty moist, too. Does he squeak if you squeeze him?
I think his head should be slightly larger. Torso length is pretty good, but the position suggests it should be arched more than stiffly straight. His pelvis seems to be missing with how his legs connect to his torso. Having the pelvic region or hips would make the join less sudden.
Dolphin with feet are unusual, but I imagine they would be pretty soft. Probably pretty moist, too.