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Friday, June 27, 2008
This fish is able to shoot its prey off a limb with a jet of water. But that’s only half the story!
We all know that when you place a spoon or straw in a glass of water, it appears to be broken. This is because of refraction, caused as the speed of light is slowed in the more dense water. This fact makes the phenomenal hunting skill of the Archer fish even more remarkable.
The Archer fish normally grows to be about 6 inches long and lives primarily in the swamps of Indonesia. It is the only fish known to man that hunts for prey outside the water. But how does a fish dine on such delicacies as flies, spiders, crickets, mosquitoes, grasshoppers, beetles, cockroaches, and even small lizards? Actually the Archer fish prefers to jump out of the water to catch the prey. This is a sure way to get a meal. But when jumping is too risky, it performs a most amazing feat. The Archer swims just below the surface of the water and watches the overhanging tree limbs or bushes. When an insect appears, it shots a jet of water at the insect, knocking it into the water. At the moment the insect hits the water, the Archer fish is there to grab it. “The archer fish has a deep groove in his mouth. When he places his tongue against this groove, he ends up with a blow tube that is about 1/16-inch in diameter. Compressing his gills forces pressurized water through the blow pipe. The rounded tip of the archer fish’s tongue acts as a valve so the fish can shoot a few small bursts or one long stream of water at his prey.” (Creationmoments.com)
Two unexplainable things about this unique hunting mechanism shout “Designed!” First, looking through the water into air, the apparent location of the insect is not where it really is. Yet in spite of this refraction problem, the Archer rarely misses either with its shot or with knowing exactly where the stunned insect will land. The only position where refraction would not be a factor is if the insect were directly above the fish. However, the Archer can shot his jet of water (filmed at 1/40,000 of a second!) at angles up to 40˚ at insects 6 feet away with the same accuracy. In other words, he is able to compensate for increasing refraction at greater angles and know exactly where to shot.
Secondly, the Archer is able to fine-tune his jet of water, adjusting its force according to the size of the prey, the distance away, and how well the prey is gripped to the limb. For example, a fly would be hit with significantly less water than a small lizard.
Imagine that the Archer fish evolved this skill over long periods of time. After the first one starved, the Archer would be no more. Yet, in one article about this amazing fish, the author stated, “This suggests the behavior is evolutionarily ‘hardwired’ and not subject to learning.” In other words, the ability to shoot just the right amount of water at an insect is permanently in the brain of the fish, but got there by chance! Isn’t it easier to believe God made the amazing Archer fish and He alone deserves the glory?
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