LOOK OUT FOR THE ALPHA!
LOOK OUT FOR THE ALPHA!!! I built a raft and protected it with stone foundations which worked against normal versions (I even tried to go solo in the water in order to make sure that it's safe). When I wanted to move my dinos to the new base, an alpha appeared out of nowhere and destroyed the raft in two hits. Megalodons attacked and everything was dead shortly. So yeah... avoid the big white fish.