Planarian

flatworm · regeneration · freshwater

Tiny regeneration experts. Planarians can regrow lost body parts, including their entire head and brain. Scientists study them to understand how healing works in living things.

Live almost everywhere. These flatworms thrive in oceans, freshwater streams, and even on damp land. They slip around in moist places hunting for food.

Simple but smart. Planarians have the tiniest brain of any animal with a real brain, yet they can sense light, smell food, and navigate their world.

Sneaky hunters. Planarians are carnivores that sense movement and chemicals in the water to find prey like tiny crustaceans and other worms.