We're told that this is a "very sad seal National Anthem" (8.1).
It's kind of like a hundred bottles of beer on the wall, but instead it's two millions seals on the beach to club.
They sing about how happy they are on the beach "before the sealers came!" (8.8)—the saddest part is "I met my mates in the morning (I'll never meet them more!)" (8.9). You know, because they went to da club, and not the one 50 Cent hangs out in.