What food do crabs like to eat?

Most crabs are omnivorous. Some crabs are carnivorous. For example, Portunus can prey on fish, shrimp and mollusks. A few crabs, such as window crabs, scrape or filter algae and organic debris.

Crab shell can be used to extract chitin, an industrial raw material, and also can be used to extract glucose. Some crabs can be used as Chinese medicine. Crab larvae or adults can be used as bait and feed. In addition, some crabs will destroy farmland water conservancy or serve as intermediate hosts of human parasites.

Extended data:

diversification

1, Portunus trituberculatus

Commonly known as white crab and swimming crab, it is nutritious and delicious. They are important economic crabs for marine fishing and breeding in China. In 20 16, the fishing and aquaculture yields reached 542 1000t and 125300 t respectively. Captured Portunus trituberculatus is prone to death and spoilage.

2. Scylla Paramo Thain

One of the important marine economic crabs in the southeast coast is mainly distributed in the coastal waters of Hainan, Guangxi, Guangdong, Fujian, Zhejiang and Taiwan Province provinces. In 20 17, the output of mariculture was nearly 152000 tons, and the output of marine fishing was nearly 79500 tons. Scylla paramamosain has the characteristics of fast growth, strong body and delicious meat.

3. Eriocheir sinensis

Also known as river crab, hairy crab, clear water crab and hairy crab. It has the obvious characteristics of "green back, white belly, golden claws and yellow hair", with four frontal teeth tips and a deep notch between the inner frontal teeth, which is "U" shaped or "V" shaped.

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