Who is A Marine Biologist?, English General Knowledge Essay, Paragraph and Speech for class 8, 9, 10 and 12 Class, Competitive Exam.

 

Who is A Marine Biologist?

A marine biologist is entrusted with a job to study numerous aspects relating to creatures that live in sea. To perform and discharge his, he has to catch fishes and thereafter study them when they are found dead, or alternatively he himself has to go into the water in order to have a close look over them while they are alive.

The most useful and important tool for the biologist is the pickling bottle, containing alcohol or formalin. In the absence of such tool, he has very little time at his disposal to keep close watch at a creature he has collected, for the animal would decay in no time.

Besides this, he uses a trawl net in order to catch fishes and other sea creatures. Such type of net is cone-shaped and apparently looks like a butterfly net. Its mouth is sewn to a hoop, and the rest trails behind. A towline from the ship is attached to the hoop. A heavy weight pulls down the line at the time when ship sails along.

Fishes alongwith water flow in the net through its month very smoothly and after sometime the water escapes and the fishes are caught in the net. For the purpose of bringing the bigger and fast-swimming fishes into the net, it is made with large meshes keeping in view the water may flow through in no time and the trawl can be towed very fast. In order to catch smaller fishes, the finer quality of mashes is used while making nets.

When the biologist is satisfied that a large number of creatures have been caught, the net is hauled in and thereafter it is tipped out into a canvas. Different types of creatures are counted and the ones to be kept are popped into their bottles. To make sure himself, at times Biologist takes colour pictures at the moment or after they die. This job is undertaken with a view to ensure the exact colour of the creature when they die. It is seen that many dead fishes lose their colour in no time in spite of the fact that they are chemically preserved. Thereafter the specimens are dissected in the laboratory. Biologist dissects to examine very minutely each and every part in respect of different creatures in order to arrive at a conclusive decision and to determine as to what are differences and similarities among them.

 

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