Just thought i would share a little info with everyone. I recently read a paper about Stomatopods and apperently they cause a phenomena called Cavitation. It causes the release of light, heat, and sound when they strike their prey. Its kinda complicated but you can read up on it here.
http://ist-socrates.berkeley.edu/~patek/shrimpMechanics/PatekandCaldwell2005JEB.pdf
http://ist-socrates.berkeley.edu/~patek/shrimpMechanics/PatekandCaldwell2005JEB.pdf