I. Whether Butter Crab is Saltwater or Freshwater Normally, Butter Crab is supposed to be grown in the river.

In fact, when you buy butter crabs, it is better to observe the appearance and color of butter crabs first.

If there are stains on the surface of the butter crab, it means that the crab has been cooked.

Therefore, please do not put them into the pot.

First of all, we need to clean the belly of the crab and just soak it in water for 1-2 hours.

Then take out the crabs and clean them carefully.

Second, how to choose butter crabs 1. Look at the eyes of butter crabs: normal butter crabs have white eyes, not gray.

However, if the eyes of butter crabs have no luster, it means the crabs have rotted, so it is not recommended to buy them.

2. Look at the claws: the whole claw can be seen from the crab's foot to the gills and there is a groove between the claw and the shell.

3. Look at the claw: the edge of the tip of the claw is very prominent, especially at the bottom of the crab pincer.

4. Look at the claws: the older the claws are, the easier they are to separate, otherwise it is not possible to determine whether they are completely separated even if the claws are still present.

5. Look at the claws: if the claws are facing upwards, it proves that the claws are tightly knit and have a round or oval shape.

If the claws are pointing down, they are not bent and are pointing down.

6. Look at the claw: Prepare a relatively thin piece of paper towel according to the position of the claw, then place the paper towel on the claw, then fold the paper towel into two until the paper towel is rolled up the paper towel, then tear off the paper towel.

Three, the introduction of the butter crab butter crab refers to the oyster (scientific name: pitha) and safflower crab (scientific name: picka) by two kinds of fish.

They are very similar in appearance.

Females and males are similar in size, with the main difference being that males have a slightly protruding back and a slightly arched rump.

Females have a soft, full body with some golden-colored antennae on the waist and abdomen.

Also, females have a flattened abdomen, thick legs with hard toes, plump paws, and strong shoulders and hips.