Confined to Mermaid (Male A, Female O)

When the meteorite fell and the land fell, the ocean ushered in spring. Mucheng avoided the cannibals on land, but she didn't expect that the mermaids in the sea also wanted to eat people? So that's not what we eat, huh? Won't species isolate? It turns out that the necklace can induce people on earth to differentiate into omegas for a second time, and even humans can become mermaids. Oh! No, is this right? Intention: to live