Pistol Shrimp
There are no prizes for guessing the special power of this tiny critter. The pistol shrimp (also called snapping shrimp or alpheid shrimp) has one tiny claw and another huge one. The latter lacks the pincers which are commonly found on most shrimp. Instead, it has a pistol-like device with a “hammer” that can produce an incredibly powerful shockwave when triggered.
Just to be clear, the pistol shrimp doesn’t have to hit its prey. The pressure from the sound alone is enough to stun (sometimes even kill) whatever it is aimed at. Not only that, but the cavitation bubble can reach a temperature of 5,000 K – that’s 800 K less than the surface temperature of the Sun!
The noise can reach up to 218 decibels, letting the tiny pistol shrimp compete with the sperm whale for the title of “loudest animal in the sea”. When these guys gather in a colony, they really do become the loudest thing in the ocean, powerful enough to interfere with sonar.
http://youtube.com/watch?v=XC6I8iPiHT8?t=36s