Smell: Dead crabs have a foul smell, while newly dead crabs have a strong smell, but the smell is not obvious. Observe the eyes: touch the handle of the crab's eyes, it is a dead crab, motionless and odorless. Water the rope: water the crab's mouth. If there is no response, there are many bubbles around, indicating that the crab has just died.

How to judge whether a crab has just died? 1, smell it.

The most direct way to judge whether a crab has just died is to smell it. Both sea crabs and river crabs smell fishy, but the dead crabs have begun to decompose and rot, so they smell stinky, while the smell of dead crabs is strong and not obvious.

Step 2 observe your eyes

A dying crab may have no vitality, or it can't move because its body is tied, but its eyes can move. If it can move by itself, it is a live crab. If it doesn't move, it's just a dead crab.

3. untie the rope with water

The crab breathes with its gills, so water its mouth. If it opens automatically, the crab is alive. If there is no response and there are many bubbles around its mouth, it means that this crab has just died. In addition, you can untie the rope to judge whether the crab has just died.