Mantis create the same cavitation bubble with the force of the impact as well.
I vote Mantis. There is no doubt a Matis would come out on top. The mantis is a much more capable and inteligent animal. Some of these guys eat blue ring octopus.
I felt the force of my two wennerae smashing a plastic zip tie i was showing them and the hit is much stronger than u would expect. it makes a loud smacking sound and sends the force through your hand