Turns out it wasn't the doing of aliens who'd overshot a Nebraska cornfield or out-of-work art students with scuba gear. No, it was a masterwork by an amorous and talented male Takifugu rubripes, the poisonous pufferfish eaten by only the bravest sushi connoisseurs.
Yoji found a series of small male fish working tirelessly, day in and night out, to craft these mate-attracting marvels using a single fin.
"Cool" is finding out that dolphins are among the handful of species on Earth that can recognize themselves in the mirror. "Cooler" is finding out that dolphins "name" themselves from a young age with a signature whistle used to signal their identity to other dolphins.