So today I took my younger sister to the beach (i live in hawaii) and in one one the kiddie ponds I noticed this small white shrimp or baby lobster thing hiding in a hole. I wish I had an underwater camera and taken a picture because it was so pretty but at least I know where to find it again if it doesn't move on to another pond. It was pure white with pinkish purple spots on it. It also had these flat claws that it started waving at me when I got closer like it was flagging down an airplane. I didn't want to touch it in case it's poisonous. Anyone have an idea of what it was?