The marine iguana is an iguana located only on the Galápagos Islands that has the ability, unique among modern lizards, to live and forage in the sea, making it a marine reptile. The iguana can dive over 30 ft into the water.
nerdy moment: babies at that age don’t have object permanence. if the object cannot be seen, it does not exist. image how freaked the fuck out you would be if suddenly everything went black - effectively ceasing to exist. the baby’s entire world vanished then came back.
so yeah. he probably did think his entire existence ended.