Jellyfish that glow do so in order to attract prey and as a form of defense against predators. Jellyfish are able to do so due to phosphorescence, luminescence or bioluminescence.Know More
Jellyfish, such as sea nettles, use their ability to glow to surprise or frighten away predators. This works because the small size and long tentacles of the jellyfish are magnified by the light, making them appear larger to potential predators. Some jellyfish drop their tentacles as a form of distraction that can confuse predators. Predators are typically attracted by the light of the falling tentacle and focus their attention on it instead of the jellyfish's body, which gives the jellyfish the chance to escape.
Some jellyfish use phosphorescence to absorb energy and slowly release it over time in the form of light. This is what gives them the appearance of glowing. Others, such as the Aequorea victoria, use the luminescent protein aequorin and fluorescent molecules to create bioluminescence that causes them to glow. The small amount of sunlight that reaches the ocean's depths where some jellyfish live allows the water to absorb red, orange and yellow light while simultaneously scattering ultraviolet light, which is absorbed by jellyfish and many other glowing sea creatures.Learn more about Jellyfish
Jellyfish eat their prey by first paralyzing them by stinging them, and then drawing the prey in through the mouth, which is a hole in the middle of the jellyfish's body, reports National Geographic. When the jellyfish has eaten and digested the prey, the waste is released through this same hole, or "mouth."Full Answer >
Some predators of the jellyfish include other jellyfish, sunfish, some sea turtles and humans. Occasionally birds and other fish will bite around the non-venomous inner tissue of the jellyfish, dodging the outer tentacles altogether.Full Answer >
Box jellyfish eat shrimp, fish and worms by using their tentacles to sting prey and then pulling the prey into their mouths. Many species of jellyfish eat their prey in this manner.Full Answer >
Jellyfish primarily eat plankton, which are organisms that lack the strength and size to swim and therefore drift in marine and freshwater currents. Larger species of jellyfish also eat crustaceans, fish and other jellyfish. Jellyfish are carnivorous and primarily feed on animals. Some jellyfish have tissue containing symbiotic algae, which enables them to receive energy through photosynthesis.Full Answer >