Blue crab living habits, blue crab living habits

As burrowing aquatic crustaceans, blue crabs prefer to inhabit muddy beaches, mangroves or marshes in the intertidal zone, burrowing in burrows during the day and foraging at night.

Blue crabs are widely distributed in the Pacific Ocean and the Indian Ocean, and their distribution area extends from the coast of South Africa and the Red Sea in the Indian Ocean to the west of the city, to the waters of Australia and New Zealand in the south, and to the Shahami and Tahiti Islands in the Pacific Ocean in the east.

Blue crab is one of China's marine aquaculture products, because of its delicate meat, delicious taste, rich in nutrition, especially the female crab with mature gonads (commonly known as cream crab), after cooking, the crab paste is sweet, and the color is orange-yellow or orange-red, therefore, it has always been popular in the market.

1. Hairy crabs like to inhabit the mudbanks or mudflats of rivers, lakes and rice fields, and also like to hide in rocks and aquatic plants. The distribution of crab holes is related to the environment in which they live. In rivers where the tide rises, most of them are located between high and low water levels, while river crabs living in lakes and reservoirs have scattered burrows and are mostly below the water surface, so they are not easy to find.

2. Hairy crabs have the habit of digging holes to live since they are young. River crabs have a very strong ability to dig holes, which can be as short as a few minutes to make a hole, and as long as several hours, or even a day and night.

River crabs mostly choose steep banks with hard soil for burrowing. At the same time, when digging holes, it mainly relies on a pair of chelicerae and eight feet to assist. Push the mud with the cephalothorax to create a depression, then dig deep with the chelicerae and pick up the mud with one side of the foot to send the mud out of the hole.

3. Hairy crabs like to be diurnal and nocturnal. They mostly hide in caves during the day, and only come out of the caves at night to forage for food. Because the compound eyes of river crabs are composed of thousands of small eyes, and they have stalks that can move, they are very keen to see and can effectively find food and avoid predators in very low light.

4. In nature, many animals have a way of survival by cutting off their appendages in order to escape for their lives. The breaking point of the appendage of the river crab is between the joint of the basal ganglion and the base segment of the appendage. This prevents bleeding and allows for the regeneration of new limbs from here.

Because hairy crabs have a strong ability to endure hunger, they generally do not eat for ten days and half a month without hunger to death.

But in June to September it grows vigorously and has a large amount of food. In other months, they are often semi-starved. During the overwintering period, they rarely eat.

These two types of blue crabs are different in size and appearance.

The biggest difference between farmed blue crabs and wild blue crabs is that wild blue crabs are more active. Fierce and powerful.

The taste of the farmed ones is not as delicious, and the wild ones will be a little better, but they will be a little dirty.

Wild blue crabs will be a little more energetic, and the clamps will be a little more powerful.

Due to the stocking in the mud pond, there will inevitably be mud between the limbs and feet of the carapace, which is most distinguishable from the wild cockroach with a clean and slippery shell.

Just by their size, you can see that the wild ones will obviously look a little thicker.

This can be distinguished by looking at the appearance, and it has very obvious characteristics.

You can see the color of his body and smell the water.

Because the crab grown up in the farm is in a different environment from the wild, resulting in a different color of their shell; Action: Wild crabs are more ferocious, while the breeders are relatively gentle. It is related to their growing environment and foraging environment; Body type:

Two crabs of the same weight, the large pincers of the wild one are more slender than the farmed ones; Taste: Wild crabs are more delicate and sweet than farmed meat.