Sunday, December 8, 2013

Innovative Nature

ArcherfishHi there! Thanks for clicking by today. How are you doing? ("How am I doing what?"), Exactly, eh! Fill your mug with some java and help yourself to a  virtual megamuffin, why don't'cha while I tell you about another marvel of nature.

The water-pistol is a harmless toy for children, but apparently it can be a lethal weapon too. This particular species of fish makes use of water jets and the laws of physics to aim at and stun its prey.

The aptly named archerfish employs a unique process to hunt land based insects and small animals – it aims, spits, and stuns. It lurks under the surface of the water, waiting for unsuspecting insects to land nearby. Then, it spits out water jets at a great force, instantly killing the prey. The entire process takes just one-tenth of a second.

An archerfish can bring down insects as far as three meters above the water’s surface. Once it selects the prey, it rotates its eyes so that the prey’s image falls on a particular part of the eye. 

Then it presses its tongue against the groove on the roof of its mouth to form a narrow channel, and contracts its gill covers to issue a powerful jet of water through the channel. The power of this shot can be altered for prey of different sizes. The jet can be up to five meters long.

Yeah...I've seen fish with that same 'spit in your eye' look many times. 

See ya, eh!

Bob

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