Isolation
He couldn't find any friends on land so now he is trying in the depths below. No one can understand him. It seems like no one gets him. He takes care of himself and his family, but no one feels the way he does towards other people.
That's when the animals started telepathically speaking to him. They told him the Universe isolated you, so you don't get distracted by the noise. It's easy to lose yourself when you have others giving their opinions and thoughts nonstop.
He realized as his oxygen was running out that there was something bigger planned for him. He was going to accept his plan, live it while loving it.
It's time to live life now regardless of circumstance. He then went up for air refreshed.