THIS IS YOUR MYTH BUSTERS GEM!!!!

[spiff]

Has any one bothered to ask a Mantis shrimp about this?

 

[VLDesign]

I did and mine just laughed and kept smashing on a trouchous snail.

 

[pcfriedrich]

I watched one of the videos someone posted here with the mantis shrimp attacking a small crab. He kept popping the crab and the crab's shell stayed intact and it was still alive. If the mantis shrimp can't crack the small crab's shell, how could it break the glass of a tank? The small crab also stayed alive til the end of the video. The Doctor.

that was a small mantis shrimp. the california mantis shrimp gets up to 13".