1, the water quality of raising crabs is too poor.

At present, the price of crabs in China is very expensive, which makes it possible to make huge profits by breeding crabs. Many farmers have changed the original paddy field into a crab breeding base, and the water circulation in the paddy field is slow and the water quality is poor. In this way, the cultured crabs have been seriously polluted, and many harmful substances will naturally be enriched in the body, making the crab meat and crab roe bitter.

2. Crab net culture time is not enough.

Generally speaking, crabs need to be soaked in clear water for at least two days after they are bought. During this period, crabs will drain completely without eating, but if the net culture time is too short, crabs will naturally have some bitterness when eating.

3. I used medicine when I raised crabs.

At present, it is an open secret that drugs are used in the aquaculture of crabs, loaches, eels and turtles. Before the viability of eels, loaches, etc. In comparison, growth hormone and a small amount of antibiotics can be mainly used, while crabs are greatly affected by water quality and need other drugs to control their growth cycle and mortality. If these drugs are not discharged cleanly, crabs naturally have a bitter taste.

Extended data:

How to choose crabs:

1, look at the appearance

A good hairy crab, the crab shell is blue-gray, shiny, and there are yellow hairs between its claws. The crab's navel protrudes outward and is round. The limbs are intact and naturally bent, and the activities are powerful. Good crabs are everywhere.

2. weigh it.

When a crab dies, it will become a pool of water. You can weigh the crab by hand. Heavy hands make the meat firm, while light hands make the meat loose.

3. Smell it

Fresh crabs will taste like ponds or mud ponds, but they don't stink. If you smell fish, you can think that the crab has gone bad.

Step 4 pull

To judge whether a crab is alive or not, it is better to pull its claws. If the crab legs contract strongly, they are fresh. The legs of dead or dying crabs are fragile and easily broken.

Step 5 uncover it

I want to buy it anyway. Just uncover the crab's navel. You can see the crab roe when you open the umbilical cover. If the crab roe is neat and complete, it is a good crab.

Baidu encyclopedia-crab roe

People's Daily Online-Can crab roe be eaten? Depends on water quality