If you travel to the fish capital, you'll find the leader of all fish, the mighty whale! Okay, so a whale isn't technically a fish, but that's why it makes such a good leader. You can usually only find whales hanging around near the capital because they really enjoy ruling over all the other fish. They are the biggest, after all.
The whale who resides over the capital just happens to be gay (げい). You only know this because his husband is a man whale too. Actually, now that you think about it, all the whales you've ever met have been gay.