The brain is the basic functioning organ behind living creatures. But as nature is endowed with limitless surprises, it is no less than a miracle to know that some animals survive without a brain, depending upon simpler systems to move, eat, and protect themselves.
These creatures prove that complex intelligence of the brain isn’t always necessary for survival. Instead of having a centralised brain, they use nerve nets or decentralised nerve rings to sense their environment and trigger reflexes automatically. Their survival depends on instincts, efficient body structures, and adaptations to their surroundings.
Here are 5 interesting organisms that survive without a brain