1, just as people rarely exceed two meters, hairy crabs rarely exceed four or two. There must be many people who retort that many of them are more than two meters, but if this figure is divided by 7 billion, the proportion will be much smaller.

2. Why is there this problem? Because diners want to eat bigger hairy crabs. So I hope there are more big crabs.

3, the problem is a natural thing, will not change according to our ideas. Sometimes the female crabs of hairy crabs are sexually mature when they are over two years old and can reproduce. They don't need to waste too much nutrition to grow into a big man, but need more nutrition to support reproduction.

4. Can artificial breeding make hairy crabs bigger? Of course, but for farmers, the input-output ratio is not cost-effective

The investment in breeding large-sized crabs alone is far greater than that in breeding ordinary crabs. Farmers have no incentive to do so.