Do jellyfish have brains?

Jellyfish do not have brains. They don't have a heart either. But jellyfish do have a very basic set of nerves at the base of their tentacles. These nerves detect touch, temperature, salinity etc. read more

The thing is, while jellyfish don’t have a brain or central nervous system, they do have a very basic set of nerves at the base of their tentacles. These nerves detect touch, temperature, salinity etc. and the jellyfish reflexively respond to these stimuli. read more

Most jellyfish do not have specialized systems for osmoregulation, respiration and circulation, and do not have a central nervous system. Nematocysts, which deliver the sting, are located mostly on the tentacles; scyphozoans also have them around the mouth and stomach. read more

Jellies have been around for 650 million years—despite the lack of a brain or any blood. Lifestyle Natasha Umer • November 9, 2015 November 26, 2015 5835 Some people think jellyfish are jerks. read more

If a jellyfish washes up on the beach, it will mostly disappear as the water evaporates. Most are transparent and bell-shaped. Their bodies have radial symmetry, which means that the body parts extend from a central point like the spokes on a wheel. read more

Jellies have been around for 650 million years—despite the lack of a brain or any blood. Lifestyle Natasha Umer • November 9, 2015 November 26, 2015 5826 Some people think jellyfish are jerks. read more