I have also noticed the same thing. Shrimp only take a leap because water conditions are less than ideal. I've only noticed this with Amano Shrimp (Cardina japonica). Ghost, Cherry Red, and Crystal Red Bee Shrimp have never done it.
I've had hatchetfish jump out of the tank before, but they'll jump out given the smallest crack. One of my chocolate gouramis (#5) jumped out on the first day of being in the tank.
Carkis
I've had hatchetfish jump out of the tank before, but they'll jump out given the smallest crack. One of my chocolate gouramis (#5) jumped out on the first day of being in the tank.
Carkis
