[Music] so in this video we're seeing the mantis shrimp about to get really angry at a tiny cell hi I'm Diana you're watching physics girl and I'm about to get curious again I'm here at Scripps Institution of Oceanography and I'm going to talk to my friend dr. Kate Furby about registrants they have to get really mad to eat oh I believe you mantis shrimp are amazing creatures right so you're in a pickle it was this paper I guess toxic spill oh my gosh the moment that they hit last a fraction of a millisecond which is why this footage was captured by scientists Mya DeVries at 20,000 and 40,000 frames per second [Music] there are hundreds of different species of man districts and they live all over the world it's kind of crazy how prolific they are and they come in like all different sizes and all different colors and these shrimp are smashed so they have what's called raptorial appendages that's this modified claws I first heard about mantis shrimp in a viral video by say Frank true facts and I don't know about you but this animal just keeps popping up so one thing finally convinced me to make a video about them and that was the force mystery in the early 2000s biologist Sheila Patek was studying the force of a mantis shrimp punch she found that they were capable of getting 200 pounds of force which is like me setting a rock on your finger and lightly jumping on it yeah I could probably break it but even more strange she saw that there were two spikes in the fourth graph one for the initial punch probably and then something else is going on the mantis shrimp punch is fast obviously but how fast unfurl as fast as a 22 caliber bullet such as Ava's 22 caliber bullet with the force of a 22 caliber bullet at the speed of a 22 caliber bullet well what does that mean the acceleration of the claws similar to a 22 caliber bullet acceleration that's what's going on come on guys always fast as such a stroller is going to force the speed of a 22 caliber bullet pull it together y'all the acceleration is like going from zero to 60 in point two milliseconds in fact the club gets up to 45 miles an hour hit a shell with that speed and you'll get one nice for speak hit a shell with that speed in water and something else will happen looking back at DeVries footage there's one frame where something shows up right there it's a bubble the crazy acceleration and force cause cavitation which is this the bounce back causes the club in the shell to move apart so fast that they leave behind any area a very low pressure approaching a vacuum but when you drop the pressure real low in water what happens water in the crook yeah vacuum pump is on pressure so enjoy boiling oh look look look look yeah yeah boy what water is boiling that's goodness they're boiling this water is still at room temperature but when you decrease the pressure the water boils so you have low pressure and then the water boils and then you get a vapor bubble but it doesn't last very long almost immediately the bubble collapses and when it does energy and light are released in a violent process violent enough to cause the second fourth peak in that graph it's caused by cavitation and the temperature in that bubble gets up to the temperature of the surface of the Sun right the temperature inside of a tiny bubble as it implodes next to a tiny fruit small and fierce so why are these animals so aggressive so the the mantis shrimp are actually they eat a wide variety of things in motion but in that group of things they eat a lot of them live in hard shell the fact that this Smasher type of mantis shrimp eats a wide variety of things including prey in hard shells and soft bodied prey is actually a very new finding of dr. DeVries so the mantis shrimp is really good at smashing shell they're also quite territorial I like the more aggressive they are as a better footage they get and so it's pretty funny trying to lady you're either trying to make the mantis shrimp like feel hungry so it smashes the call the shell or trying to like make it annoyed I like it out of my god yeah you do your best impression of a mantis shrimp so I saw one one time in my life I've been to course around the world for years and I've seen one so we made this from comes Alex [Music] it was pretty accurate Kate you are a rock star thank you so much to dr. Kate Fermi for helping out with this video and to dr. Maya degrees and one more shout out to deep look they're an awesome channel on PBS Digital Studios if you haven't seen their video about mosquitoes it is terrifying and fascinating I've got a link to them in the description at the end of this video they provided all of the footage of the colorful mantis shrimp in this video so a million thanks to them thank you guys so much for watching me get curious again and happy physics things [Music]