Specifically, this song is about the capybara, which is the largest living member of the rodent family. Found in South America, they live on land but also spend a lot of time in the water. In the 16th century, the Pope said that they could be considered fish. This was because of the fact that they were semi-aquatic AND because Catholics aren't supposed to eat meat during lent. After that, since capybara were considered fish, people could eat them all year round, despite the fact that they're actually mammals.
So this song IS about something that really happened. There are many possible meanings behind it, though.
Specifically, this song is about the capybara, which is the largest living member of the rodent family. Found in South America, they live on land but also spend a lot of time in the water. In the 16th century, the Pope said that they could be considered fish. This was because of the fact that they were semi-aquatic AND because Catholics aren't supposed to eat meat during lent. After that, since capybara were considered fish, people could eat them all year round, despite the fact that they're actually mammals.
So this song IS about something that really happened. There are many possible meanings behind it, though.