Tomb Robber: I Fell into the Sea and Merged with Dolphin Genes

When I read the record of tomb robbing, I saw time travel, and when I opened my eyes, I was immersed in the stormy sea. The system arrived, and the dolphin gave me a gene when it passed by. It can breathe in water and can also perform echolocation. A fishing boat caught me in the waves. When the fat man saw it was a man, he said that it was a waste of effort. I am Lin Yang. I just climbed out of the sea. The two people in front of me look familiar. First figure out which world you are in.