Sublime

Cymothoa exigua, or the tongue-eating louse, is a parasitic isopod of the family Cymothoidae. The parasite severs the blood vessels in the fish's tongue, causing the tongue to fall off. It then attaches itself to the remaining stub of the tongue and becomes the fish's new tongue. 📸 : ©Els Van Den Borre / @elsvdborre #sea... See more

https://t.co/N8UefAbVLE

The Greenland shark (Somniosus microcephalus), also known as the gurry shark or grey shark, is a large shark of the family Somniosidae ("sleeper sharks"), closely related to the Pacific and southern sleeper sharks.[2] Inhabiting the North Atlantic and Arctic Oceans, they are notable for their exceptional longevity, although they are poorly studied... See more

Whale lice

Scientists noticed that a lizard a secretes a poison that causes its prey to starve to death and decided to repurpose it for weight loss in humans - resulting in Ozembic. I am extremely impressed by how creative that is.