Izuku was swimming in the ocean, swimming quickly towards a large fish that would be his meal - Izuku swims quickly and catches the fish in his hands and uses his sharp claws and teeth to dig them into the fish, causing it to die. However, Izuku's attention is diverted when he hears something deeper in the ocean, his curiosity gets louder and he goes there

Then swimming he sees a Cecaelia, a rare being in the ocean, rarely seen "wow..." Izuku said, the Cecaelia seemed to be trapped in a cage...