Latin scientific name: jellyfish

Common name: sea snake

It belongs to coelenterata.

Morphological characteristics:

The umbrella body is hemispherical, the diameter of the umbrella is generally 30 ~ 45cm, and the maximum can reach1m. The outer umbrella is smooth, with 130 ~ 180 petals on the edge. Body color changes greatly, mostly blue-green, but also deep red or brown. Fingers and accessories are white. Like warm water, like living near the estuary, self-swimming ability is very small, often floating with the tide, wind direction and current. Sensitive to light and seawater salinity, it generally rises to the sea surface in the absence of wind or in the morning and evening, and sinks in case of storm, rainstorm or too strong sunshine.

Living habits:

The aquatic mother of jellyfish lives in the ocean and inhabits the coastal waters, especially near the Xiqi estuary. The water depth in the distribution area is generally 5-20 meters, sometimes up to 40 meters.

Reproductive habits:

Jellyfish are hermaphroditic and mature in autumn. The individual fecundity of jellyfish is proportional to the diameter of umbrella. General individual fertility can reach 30 million eggs, up to 50 million eggs.

jellyfish

Jellyfish is a marine coelenterate. Jellyfish body is umbrella-shaped, translucent, white, cyan or yellowish. The diameter of jellyfish umbrella can exceed 45 cm, and it can reach 1 m. Eight thickened (shouldered) wrist bases under the umbrella healed to make the mouth disappear (replaced by the secondary mouth of the suction cup), and there were many rod-shaped and filiform tentacles in the lower mouth and wrist. Its function is to release venom paralysis when it comes into contact with small animals for food. Jellyfish are widely distributed in tropical, subtropical and temperate coastal areas. The common jellyfish in China are edible jellyfish with smooth umbrella surface and only filaments on the mouth and wrist or rod-shaped jellyfish with rods, and Mylabris with many small warts on the umbrella surface.

The life cycle of jellyfish has experienced fertilization, aphid development, larval development, jujube cracking and jujube butterfly formation. In addition to the sexual reproduction of sperm and eggs in vivo, the salamander larvae of jellyfish will also produce creeping roots to form foot sacs, and even split into multiple disks, which will greatly increase their individual number through asexual reproduction.