Do jellyfish have brains?

I've been recently asked this question and so i did a little research of my own. Here's what I was able to dig up.

Despite their name, jellyfish are actually not fish! Jellyfish are made up of over 95% water, and they do not have brains, hearts, gills, bones, or blood. So, if jellyfish are not fish, what are they? Jellyfish belong to an animal group called invertebrates, because they do not have backbones. Fish are vertebrates, because they have backbones.

Jellyfish do not have a brain like us. They have a complex network of nerves which respond to things, but they cannot think about things.

There are more than 200 different species of jellyfish in the world. They come in a variety of sizes and colors. Lion's mane jellyfish are the largest species of jellyfish - their bells (jellyfish's round, umbrella-like bodies) can reach 8 feet across and their tentacles can be more than 200 feet long! Most jellyfish have see-through bells in all sorts of colors. Some even glow in the dark!



So there you go. Amazing little creatures. Now the one on the left is one BIG jellyfish. They're nice to look at.. All graceful and stuff.. Flying around in a world of their own. Wouldn't even think about diving anywhere near a jellyfish that size though..




That's it for now.. haha 1st blog post! Couldn't have imagined my first one to be about something like this..