They’re at a party at the beach where everyone has matching towels. And then someone spots a rock lobster. (This could have happened if the party was in New Zealand.)
Most of the rest of the song they just repeat “rock lobster, rock lobster, rock lobster” over and over again.
The scenes in the video don’t have anything to do with the song, or maybe I’m just not smart enough to see the connection.
But it’s still a really cool song, and I was a big fan of the 80s cover band “Rock Lobster” which used to play every weekend at Martini Ranch in Scottsdale in the 1990s. Of course, this was one of the songs on their playlist.