Jellyfish have no brains, but they have a complex nervous system. They also have a primitive brain that is able to sense light, touch, temperature, and chemicals in the water. There are plenty of jellyfish species that can be found in the ocean. These jellyfish are typically found in shallow waters near the coast or coral reefs. Jellyfish are not capable of any form of locomotion and they lack eyes or other sensory organs.
Jellyfish use their tentacles to navigate around the ocean. Jellyfish do not have brains but they do possess a primitive brain that is able to sense light, touch, temperature and chemicals in the water. They also have a complex nervous system with cells called cnidocytes which function like neurons and can react to stimuli from outside stimuli such as light or chemicals in the water.
The primitive brain of a jellyfish is able to sense light, touch, temperature, and chemicals in the water. Jellyfish use their tentacles to navigate around the ocean. Jellyfish do not have brains but they do possess a primitive brain that is able to sense light, touch, temperature and chemicals in the water.