Do jellyfish have all the senses and "hidden" facial features?

@blueberry_kid They are indeed really cool. Have you seen pictures of the world’s largets species? Here;s a Lion’s Mane next to a scuba diver for comparison. How cool is that?

Jellyfish don’t really have brains, but they do have a nervous system and are capable of processing sensory input and reacting to it. There nerve cells must have some features similar to the axons of neurons in a brain. They can sense the smell of food and move toward it. Some are more complex than others. Quite a few have primitive pigment-cup ocelli that let them detect where light is coming from.

The “box jellyfish” is among the most venomous animals on the planet. Any major encounter between a human and a box jellyfish is nearly always fatal in minutes. Even a small sting from a broken-off bit of tentacle is excruciatingly painful and raises a large, keloid-type welt that lasts a lifetime. But dangerous as they are, they are also the most advanced of Jellies, with a complex nervous system and compact, umbrella form that lets them swim very fast.

Box jellyfish have 32 true eyes complete with retinas, corneas and lenses. ranged in sets on their 4 sides around their circumference. Various eye sets are sensitive to radiation of different wavelengths. Obstacle-course tests show they can “see” and avoid obstacles. They can also “see” and pursue food or threatening animals. They aren’t able to see specific shapes, but can detect light verses dark areas and basic shape.

@ETpro Damn, that lion mutha, if I see that in my fucking bathtub…haha, but your post is awesome. I like learning stuff. And the box jellyfish has 32 functioning eyes? O_o Nature’s some crazy business man.

@Symbeline Nature certainly isd full of surprises. I totally love studying it.

I like nature too, but I don’t have many means of studying it beyond the Internet. Or going out and checking stuff out, but that doesn’t yield much if you’re not a professional. What do you know about sharks? I like them a lot.

@Symbeline I love sharks too. The awesome predatory power of the great whiteational-Wildlife/Animals/Archives/2007/Great-White-Rocket.aspx, the unique vision of the hammerhead with its two eyes set so far apart for accurate stereo vision. The incredible size of the whale shark which filter feeds on tiny creatures. I know they have survived in their modern form for several hundred million years. Pretty impressive. There is a tremendous amount more to nknow, of course, and the Internet is a great resource to find it.

@ETpro Yeah, I read a lot about some types of sharks being awesome about retaining a lot of their prehistoric traits. But being impatient, I keep on thinking about the Megalodon lol. Do you have a favourite shark?

Also stereo vision; own.

@Symbeline I like them all. But if I had to pick one for a wall poster I’d get a image of me swimming with a basking shark because they are such gentle giants.

@ETpro Didn’t read the whole thing, just the opening paragraph, but I bookmarked it for later. (Scotland has sharks!) Are those like those sharks that have no teeth and eat plankton, like some whales? (forgot the name for those, but they’re pretty big too, a man could easily swim inside the mouth)

My fave is the Great White. I admit; I didn’t know dick about them before watching Jaws lately, and looking them up online. But after that, I found that they’re really interesting sharks. They smell through biting, but despite that, they’re not as retardilly (not a word I know) hardcore as the franchise makes them out to be. Spielberg should have used the Tiger Shark lol.