China's eight common species of jellyfish are: sea moon jellyfish , ctenophore jellyfish, purple striped jellyfish, swimming jellyfish, jellyfish, root mouth jellyfish, flag mouth jellyfish, jellyfish.

1, Cuban Jellyfish Order

The whole umbrella is cubic, umbrella rim is also quadrilateral, in the inter-spokes area by the umbrella rim extends one or more tentacles, tentacles at the base of the formation of pedipalps, with eight tentacle capsule, is located in the inter-spokes and the positive spoke area on the umbrella rim. The lower parachute extends inward to form a pseudomarginal membrane. Has a marginal nerve ring and is connected to the tentacle sacs, which is somewhat similar to the hydroid jellyfish.

Developing mantle mouth larvae can form directly into adults, mainly in the shallow tropical and subtropical sea, a few in the open ocean in the floating life. The stinging cells on the tentacles are highly toxic, posing a threat to shallow swimmers, and are commonly represented by species such as the hand-trailing jellyfish and the box jellyfish.

2. Crown Jellyfish

The body of the jellyfish is in the shape of a dome, cone, or flat rows, but there is a tight groove in the middle of the outer umbrella, which divides the umbrella into upper and lower parts, and the corresponding gastric sac is also divided into upper and lower parts. Under the groove there is a ring of thick pedipalps, the lower end of which is a tentacle, and the umbrella rim is equipped with a tentacle capsule, which is mainly of deep-sea origin, e.g., Marginal Leaf Jellyfish.

3, Cross Jellyfish

is a species of mantle jellyfish that lives in a fixed position, and its body is formed by the combination of hydroids and jellyfish, which is shaped like an inverted trumpet. The upper umbrella is extended into a stalk, with a basal disk at the end for fixation, the lower umbrella is upward, the umbrella is in the shape of a cup, the umbrella rim has 8 edges, there are 8 clusters of short tentacles, there is no tentacle capsule, there is only a sensory vesicle inside the tentacle clusters, the mouth is quadrilateral, located in the center of the lower umbrella, the mouth is surrounded by 4 small oral lobes, the gastric cavity has a gastric capsule and a septum.

Floating wave larvae do not have cilia, after crawling, fixed development into a body. They are often found in colder waters and live attached to seaweeds, such as trumpet jellyfish and high cup jellyfish.

4, root mouth jellyfish order

Close to the flag mouth jellyfish, but the umbrella edge without tentacles, the mouth carpal fusion, mouth closed, and the formation of a number of small sucking mouth. Early development has a normal mouth, and has four mouth lobes, later development of the four mouth lobes branched into eight mouth carpals, mouth carpals and then branching fusion, the original ciliated grooves in the mouth carpals fusion into small tubes and sucking mouth.

The sucking mouth, the small tube and the gastric cavity is connected to the gastric cavity, the gastric cavity also has a radial tube, the ring tube may or may not have a tentacle capsule, the representative species, such as jellyfish, jellyfish, and so on. Jellyfish is rich in vitamin B, a valuable food, the East China Sea, the South China Sea and other coastal production is more abundant.