What do crabs eat?

The main food of crabs is small fish, shrimp, seaweed, etc. Crabs spend most of their time looking for food. They are generally not picky about food and can eat anything their claws can get. Small fish and shrimp are their favorite, but some crabs eat seaweed and even animal carcasses and plants. Can be eaten. Crabs eat other animals, and other animals may also eat crabs. For example, humans treat crabs as delicacies, and water birds also eat crabs. Some fish also like to eat crab legs just like humans. When young and immature crabs float in groups in the sea, they may be preyed upon by other marine organisms. Therefore, crabs must lay a large number of eggs when spawning to ensure the survival rate of the crabs.

Extended information: Morphological characteristics of crabs Although crabs are small, they have all five internal organs. After removing the hard shell of the crab, we can find that the crab's body is protected by a shell. These shield-like shells are called carapace by biologists. The body of the crab is symmetrical and can be divided into the forehead area, eye area, heart area, liver area, stomach area, intestine area and gill area. The two sides of the crab's body are connected by appendages. The appendages on the head are called antennae, which provide touch and smell functions. Some appendages have mouth functions, which are used to tear food into the mouth. The crab's thorax has five pairs of appendages called thorapods. Based on the characteristic that the two legs at the tail end of the crab are less involved in walking, a 6-legged lateral moving walking mechanism was developed by imitating the walking method of the crab, and its motion characteristics were studied to meet the needs of soft ground and agricultural production. Ground travel requirements.