Found this link on a diveforum, and thought some here might want to see it. Think it's new to this forum since I couldn't find it while searching...
Edited by Grayscale, 14 June 2009 - 01:43 PM.
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Posted 14 June 2009 - 05:13 PM
Posted 14 June 2009 - 05:20 PM
Posted 16 June 2009 - 07:03 AM
Canon 5DMkII in Aquatica, 1DsMkII in Seacam, G15 in RecSea...Inon Z240's...too many lenses
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Posted 16 June 2009 - 08:26 AM
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Posted 16 June 2009 - 10:15 PM
Well, according to the presentation the snapping speed is 20m/s. A .22 caliber bullet goes 330 m/s. The mantis shrimp, while fast, is no bullet. Similarly, I am pretty sure that a .22 cal bullet has quite a bit more energy behind it. The mass of the .22 caliber slug is between 2 and 4 grams. I don't know what the mantis shrimp smasher arm weighs, but I would be very surprised if it was this much especially since it isn't made of lead. The energy expended is 1/2 m v^2 and since both the bullet mass and velocity are higher than the shrimp, it is pretty clear that the bullet wins on all counts. Still the mantis shrimp is a very impressive creature. I really enjoyed the lecture and loved the info about the induced cavitation bubble that creates a second strike.
Supposedly hits with the speed and force of a .22 cal bullet.
Edited by drsteve, 16 June 2009 - 10:18 PM.
Canon EOS 5D3, Aquatica Housing, Inon Z220+Z240 strobes, Sea&Sea TTL, ULCS Arms
Posted 17 June 2009 - 07:09 AM
Another fun fact about them is that while humans have three different types of color sensors in our eyes (which gives us a three dimensional color space i.e. RGB), the mantis shrimp has 7 distinct color sensors which gives it a 7 dimensional color space. It can distinguish between many colors that look identical to us. In other words we are all extremely color-blind compared to the shrimp!
Posted 30 June 2009 - 04:47 PM
Posted 30 June 2009 - 08:08 PM
Posted 27 December 2010 - 12:13 PM
That was cool but I thought that the 22 analogy was for another crustacean that snapped its claw together creating a percussion which would render pray unconscious.....can't recall the name though.
Posted 12 February 2011 - 10:59 PM