Rays, also known as Lao Ban, Lao Li, Pufu and Chondrichthys. Is the general term for rays and rays. There are about 380 species in the world and 38 species in China, which are widely distributed in the Three Seas and also found in the coastal areas of China.
Morphological characteristics:
The body is flat and the tail is slender. Some species of rays have one or more jagged edge spines on their tails. Rays' eyes and blowholes grow on the top of their heads, and their mouths, noses and gills split at the bottom, gradually evolving to adapt to underwater life. Teeth are like stone mortar, everything can be ground. There is a poisonous red thorn on the back, which will kill people. Rays have a circle of fan-shaped pectoral fins around their bodies, and their caudal fins degenerate like a long thin whip, moving forward by the wave-like movement of pectoral fins.
Extended data
Living habits:
It is a kind of fish near the bottom of the sea, often lying on the bottom of the sea or buried in sand and mud. Sometimes they crawl on the bottom of the sea or swim by the sea. Swimming mainly depends on the pectoral fin fluctuating back and forth, moving slowly, lurking during the day and foraging at night. They mainly feed on small crustaceans, polychaetes, mollusks, small fish and cephalopods. Laying eggs, the eggs are covered with a layer of horny shells with four corners, which can be attached to attachments through the protrusions of the four corners for development. Usually spawn in batches every few days, with 2 eggs each time.
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