Who is an ichthyologist? Detailed answer

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Who is an ichthyologist? Detailed answer

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Who is an ichthyologist?

An ichthyologist studies the creatures that live in the sea. To do this, he must catch fish and study them dead. Or he must go down deep under the water and observe their life. One of the most important tools of an ichthyologist is a vessel with a solution containing alcohol or formalin. Without this solution, he would have too little time to study the creatures he caught, as the animal quickly decomposes. In addition to the solution vessel, the ichthyologist uses a trawl net to catch fish and other sea creatures.

The trawl net is shaped like a cone and is very similar to a butterfly net. Its wide part is sewn to the hoop, and the remaining part stretches behind. The towing cable from the ship is attached to the hoop, and a heavy load pulls the cable down while the ship is moving. Water and fish enter the net through its wide part. Water is passed through it, but the fish remain. For catching large and fast-swimming fish, a net with large cells is made so that the water passes easily and the trawl net stretches quickly. For catching smaller fish, the cells are made smaller.

When the ichthyologist feels that enough fish have been caught, the net is pulled out and the contents are dumped onto a tarp. Various marine animals are counted, those needed for research are placed in vessels, the rest is poured back into the sea or sent to the ship's galley (i.e., the kitchen). Sometimes color photographs of caught specimens are taken literally a few minutes after their death. This is done because dead fish lose color very quickly, even if measures are taken to preserve them.

In the laboratory, samples are dissected, that is, carefully divided into parts in order to study each of them separately. Biologists dissect creatures in order to study their internal structure. Then their differences and similarities are highlighted.

Author: Likum A.

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