Whodathunk that brittle star walks like a man. After all, unlike the bilaterally symmetrical humans, the sea creature is round and has five limbs:
In a series of first-time experiments, Brown University evolutionary biologist Henry Astley discovered that brittle stars, despite having no brain, move in a very coordinated fashion, choosing a central arm to chart direction and then designating other limbs to propel it along. Yet when the brittle star wants to change direction, it designates a new front, meaning that it chooses a new center arm and two other limbs to move. Brittle stars have come up with a mechanism to choose any of its five limbs to be central control, each capable of determining direction or pitching in to help it move.
Not bad for a creature without a brain. Wait, come to think of it, that's something it has in common with some people I know! Link