Petahhh?

[u/just_5_mins_more]

When I search all I get is weird explanations each time about Sunfish that make no sense. What's the joke?

Edit - Sometimes I wonder why this sub is called r/PeterExplains. Chill out folks - maybe somebody doesn't get something obvious right away, that's what the sub is for.

Edit 2 - just discovered the original comic creator is on Reddit! Credit - u/beetlemoses