Jellyfish is a kind of marine life, but also a very good-looking creature. Their shape is more beautiful, generally umbrella-shaped, and with some tentacles. Moreover, their color is also very beautiful. There are many different species of jellyfish, and these different species of jellyfish have different colors, and overall the colors are very diverse.
For example, the Moon Jellyfish in the Bottle Jellyfish, which is relatively large among all jellyfish, is blue in color. For example, comb jellyfish, their shape is generally better than the shape of bowl jellyfish, and their colors are more diverse, some are transparent, some are red, and some are blue. And man-of-war jellyfish are more common, their shape is more like a hat, so named, their color itself is more diverse, purple and blue.
When observing jellyfish in aquariums, we may observe the phenomenon of their color change. But in fact, jellyfish do not change color, and the color change we observe is only the effect of light. The jellyfish in the aquarium are already beautiful, but in order to make them more beautiful, aquariums sometimes arrange some lights, so that they can produce different effects, from the appearance that the jellyfish themselves change color, but in fact it is not their own color change.
Although jellyfish cannot change color, they may glow. For example, when ctenophores swim in the water, they sometimes emit some spherical light, which is relatively easy to observe.
