This sounds like there's a great story behind it...
Sadly it doesnt ;-; it was pretty chill. Like, we were all sitting down for dinner at the beach, and we were eating stuff we'd caught that day, and my sister just nudged me in the arm and pointed to it on her plate with her fork and we were both like O__O "better not mention this while everyone is eating"
The end. ,,,,,but....yeah.. a mystery.