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They can't see. They are more or less like plants. They are blind so they operate by touch (i.e. if anything touches there tentacles, they release toxins).They have privative eyes. Unlike our eyes they can't see exact shapes. They can however detect differences in colors. They can then react to a given situation based upon those colors. Correction: They don't have eyes. They use stimuli in their tentacles to sense things.
Wiki User
∙ 9y ago
Wiki User
∙ 8y agoTrue jellyfish have no eyes. Jellyfish can detect light and dark, which they do with the ocelli. The number of these ocelli can vary from very few to several hundred, often with one at the base of every tentacle. These photosensitive organs are nothing like vertebrate eyes. There is no lens nor retina, so no images can be formed, and hence they can't distinguish distance and shape. There are also no rods & cones, so they do not detect color in the usual sense. The pigments in the ocelli might be more sensitive to certain colors. It is true that some species have no ocelli.
In the case of Polyorchis penicillatus, for example, if you shine a light on them, then suddenly douse it, they will immediately begin to swim. A reaction to the change in light level. Jellies will start swimming as it gets dark (avoiding a predator), and hence avoid getting tangled. The mechanism is that the change in light level causes some kind of neurotransmitter release which in turn opens the gates which allow the pacemaker part of the animal's 'brain' (nerve ring) to start driving the swimming muscles.
Box jellies, or Cubozoans, however, (not true jellies) have developed rather complicated eyes. Some of their eyes have lenses and retinas, and studies have shown that they use them to navigate obstacles. They also have demonstrated behaviors that also indicate an ability to track prey. Much more research is needed to clarify these issues, however.
Wiki User
∙ 15y agoWith eyes, called ocelli; most of them can see shapes, distances, colours and movements.
Wiki User
∙ 12y agoNo, they can't even hear or see . But many have light sensitive organs around the margins of their bodies that detect objects.
Wiki User
∙ 12y agoI know that the moon jellyfish is
Wiki User
∙ 10y agoYes.
Wiki User
∙ 12y agoYes
Wiki User
∙ 13y agoNo.
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How do lion's mane jellyfish communicate?
i think they don't communicate with each other.
What does the nerve net of a jellyfish do?
it allows jellyfish to communicate, track where they are going, feel its surroundings, and find food.
How do jellyfish communication?
I don't think jellyfish communicate with each other.they don't
Where do the jellyfish live in SpongeBob?
The jellyfish live in jellyfish fields.
Is the box jellyfish a true jellyfish?
Yes, the box jellyfish IS a true jellyfish.
What are the medical application of jellyfish?
well i think its because something from the jelly fish that can make us communicate with dolphins we can eat it and they can eat it and we can under stand each other we can teach them about human life and they can teach us about theres
Where to purchase a jellyfish?
You can purchase jellyfish at Jellyfish Art. They ship tanks and jellyfish anywhere in the US.
What are three sentences for the word jellyfish?
Jellyfish were one of the first creatures to exist on the planet.He was stung by a jellyfish on holiday.Some jellyfish are harmless.
What is an adult jellyfish called?
An adult jellyfish is called a Jellyfish.
What is the genus of a Immortal jellyfish and a Lion's Mane jellyfish?
Immortal Jellyfish: TurritopsisLion's Mane Jellyfish: Cyanea
Interesting jellyfish facts?
An interesting fact about jellyfish is that jellyfish do not have brains. Jellyfish can be transparent or brightly colored. A group of jellyfish is called a bloom or swarm.
Do pet stores have jellyfish for sale?
No but you can buy jellyfish online at Jellyfish Art. They ship tanks and jellyfish anywhere in the US.
