The sea lamprey is an invasive fish with a round mouth like a suction cup. It latches onto big fish like lake trout and salmon, drills its razor sharp tongue into them, and gets fat drinking their blood and body fluids. A single lamprey can kill up to 40 pounds of fish in its lifetime.
Scientists spend a lot of time trying to outsmart them, and they’ve just made a new discovery.
When you’re a male sea lamprey, with that slimy skin, and a suction cup full of teeth for a face: you’ve got to compensate for that somehow.
Hey baby, is it hot in here? Or is it just me?
It turns out male sea lampreys are hot. They grow a swollen ridge on their back when they’re sexually mature. Scientists at Michigan State University have discovered that ridge heats up when males get around a lady lamprey.