Ascidian - Tadpole

A "gravity-sensor" that pulled him toward the safety of the dark seafloor.

A "light-eye" that told him to swim away from the bright surface where predators lurked. ascidian tadpole

As he flicked his muscular tail, Pip felt the power of his , a flexible rod that made him a relative of the great whales and humans. His tiny brain, a cluster of only 170 neurons, hummed with data from two specialized organs: A "gravity-sensor" that pulled him toward the safety