[rozab]

>no one really knows if they even recover down there

It seems like it would be pretty easy to find out. I guess there isn't much motivation to open that can of worms.

[nomel]

If the answer is a hard no, then you could fully bleed out just 1/3 of the crabs. My naive assumption is that this would help guarantee a stable population, which would probably be beneficial to the bleeders.