I’m not sure why I feel this way, but imo this is the most cursed marine mammal fact I have ever heard
THAT’S RIGHT AND THANK YOU FOR REMINDING ME SO I CAN INFLICT THIS ON EVERYONE AT 1AM!
Mammals normally shed their skin in small flakes all the time when their skin cells die off, but because whales are living in the ocean -AKA, Bacteria Stew- flaking off like that would cause microabrasions (really tiny cuts) that would mean the whale is continually fighting off infections. So, when a whale needs to replace it’s dead skin cells, it preps it’s new skin underneath, then sheds all it’s dead skin cells at once, like a lizard:
but not having hands makes it hard to remove this gross film, so molting brings many whales clsoe to shore where they can roll around on rocky/sandy coastal seabeds to scratch it off. Here’s a bunch of Beluga coming in for a mass scratch:
And THIS is what a chunk of Sperm Whale Molt looks like, floating in the water before it’s devoured by pelagic microfauna, because you take what calories you can get in the open ocean: