Because of the presence, inside them, of symbiotic microorganisms called zoochlorellae, which have green pigments like chlorophyl, in order to perform photosynthesis.
Cyphozoan (a type of jellyfish) is the only jellyfish harvested for food. Also some species of jellyfish can be used in biotechnology where scientists experiment with the genes from jellyfish e.g GFP (green fluorescent protein) which can be inserted into the cells of other organisms.
Blue jellyfish typically have a bluish hue and longer tentacles compared to green jellyfish, which are usually green in color with shorter tentacles. Blue jellyfish are commonly found in open ocean waters, while green jellyfish are often found in coastal areas and estuaries.
Jellyfish are translucent, but some can have colored parts with pink, red or yellow pigments or with microorganisms inside them that give them green, brown or blue coloration's. Pigments, usually, give red, pink or violet hue's. * Microorganisms like zoochlorellae are green. * zooxanthellae are brown. * Some blue colorations can be due to the presence of Cyanobacteria. Some jellyfish, like Pelagia noctiluca or some Trachymedusae, are bioluminescent and can give off green or multicolored flashes.
Jellyfish can bioluminesce when they are stimulated. The luminescent light produced is bluish in color, attributable to a molecule known as aequorin, but in a living jellyfish it is emitted via a coupled molecule known as GFP, or green fluorescent protein, which causes the emitted light to appear green.
They eat jellyfish.
Perhaps.
Green sea turtles eat mostly jellyfish.
The distinguishing characteristics of the green jellyfish species include its vibrant green coloration, translucent bell-shaped body, and long tentacles with stinging cells for capturing prey.
Green Sea Turtles because green sea turtles eat jellyfish.
Be specific, what kind of jellyfish? For a Box Jellyfish, it is some sort of neurotoxin.
Some sort of jellyfish???
Most jellyfish are not dangerous. The Man o' War has the ability to do some painful damage to your skin, but it is not a true jellyfish . . .