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.
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
Moon jellyfish primarily eat planktonic crustaceans, but they also eat other small plankton including molluscs, fish eggs and smaller jellyfish. They catch their food with sticky mucus that lines the underside of their bells and then direct it into their four stomach pouches with their tentacles.Full Answer >
Jellyfish are animals of the phylum Cnidaria, class Scyphozoa, order Semaeostomeae and family Cyaneidae. The phylum Cnidaria is an incredibly ancient group of invertebrate animals, stretching back hundreds of millions of years. Jellyfish are among the oldest types of multicellular animals. True jellyfish have a number of distinguishing characteristics by which they are classified.Full Answer >
Box jellyfish mostly live in the waters of the Indo-Pacific region and near the coast of northern Australia. The box jellyfish usually lives for less than a year in the wild.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 >