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The Bottle-nosed Dolphin

explanatory Essay
1126 words
1126 words
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The Bottle-nosed Dolphin is the most studied and generally the best-known species of dolphin. Bottle-nosed dolphins are classified "Tursiops truncates" in scientific name, and belong to the family Delphinidae, in the suborder Odontoceti, order Cetacea.
This animal is a very intelligent individual. Bottle-nosed dolphins are commonly found in zoos or marine parks because of their capability to perform tricks. They can jump through hoops 5 meters high because of their incredibly powerful tail. As well as jumping, Bottle-nosed dolphins can raise themselves upright out of the water and travel backwards, by threshing their tails.

Bottle-nosed dolphins are generally coastal creatures, occurring along almost all tropical and temperate coasts, although offshore varieties also occur. In addition, the Bottle-nosed dolphin is called the "all-ocean" dolphin, meaning that it lives in every ocean. It is common for a school of 20 dolphins to live together in coastal regions, but school of 200 dolphins are found in the offshore verities. These schools do not seem to have a leader and generally stay together for life.

Such sea life as shrimp, squid, small sharks, other vertebrates and fish are all a part of a Bottle-nosed dolphins diet. When they find a large school of fish, several schools of dolphins join up to form groups of up to 1000 dolphins. They work together to head and catch the fish. Another feeding method the Bottle-nosed dolphin has developed is chasing the fish on to mud banks and snaps them in the air.

Bottle-nosed dolphins are an extremely adaptable mammal. For example, the Atlantic Ocean form tends to be a little smaller and stockier with a shorter rostrum (nose) compared to the Pacific form. In Scottish waters, Bottle-nosed dolphins are chubby with a dark gray complexion, while the in Australian waters, Bottle-nosed dolphins are thin, light gray appearance, with a dominant circle around each eye. The reason why this dolphin may change its physical appearance is because there may be more fish in Scotland, or the prey may be a slower breed, making the Bottle-nosed dolphin not work as hard for its food, therefore creating a chubbier breed of Bottle-nosed dolphin compared to other parts of the world. Bottle-nosed dolphin have recently been introduced and are now bonding with hum...

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A Bottle-nosed dolphin skeletal system is believed to be originated from the basic mammalian skeleton, but has gone through a number of changes. Firstly the forelimbs have been modified into flippers and the bones of the hind limbs have disappeared altogether. Such bones as the rib cage and the spin have also undergone transformation in the fact that they have cured and caved-in due to water pressure. These creatures hold their breath for about 15 minutes before having to submerge for air. The Bottle-nosed dolphin is an amazingly strong creature. Because it never stops swimming, the Bottle-nosed dolphin has a very powerful tail, which is capable of supporting its weight of about 400 kg.

Another factor of a Bottle-nosed dolphins anatomy, which needs mentioning, is its blood circulation. The remarkable feature of this system is its retia mirablilia. This feature is also labelled "wounder nets", which is when the blood vessels create "nets" to protect vital organs form the effects of water pressure.
In conclusion, the Bottle-nosed dolphin has many incredible factors, which make it one of the smartest and elegant mammals in every ocean in the world.

In this essay, the author

  • Explains that the bottle-nosed dolphin is the most studied and generally the best-known species of dolphin.
  • Explains that bottle-nosed dolphins are intelligent individuals who can jump through hoops 5 meters high because of their powerful tail. they can raise themselves upright out of the water and travel backwards.
  • Explains that bottle-nosed dolphins are generally coastal creatures, occurring along almost all tropical and temperate coasts, although offshore varieties also occur.
  • Explains that bottle-nosed dolphins feed on shrimp, squid, small sharks, other vertebrates, and fish.
  • Explains that bottle-nosed dolphins are an extremely adaptable mammal. they are chubby with a dark gray complexion, while in australian waters, they are thin, light gray.
  • Explains that bottle-nosed dolphins mature between the age of 5 to 12 years, and males at 9 to 13 years. they have a multimale, multifemale mating society.
  • Explains that bottle-nosed dolphins are dark gray or black above, with a lighter colour on its stomach, which can change to pink in warm water.
  • Explains that bottle-nosed dolphins were hunted in the 19th and 20th centuries for their skin, but now are a legally protected species but killings still occur due to angry fishermen.
  • Explains that bottle-nosed dolphins communicate by whistles, rasping sounds, and echolocation. they swim with ships for food, which is common for cruise ships.
  • Explains that bottle-nosed dolphins have great hearing capabilities, just as we use the power of speech. they respond to tones within the frequency range of 1 to 150 khz.
  • Explains that bottle-nosed dolphins have an acute vision both in and out of the water. they have a highly developed tapetum lacidum, which reflects light through the retina, giving them enhanced vision in dim light.
  • Explains that the bottle-nosed dolphin's skeletal system originated from the basic mammalian skeleton, but has gone through a number of changes.
  • Explains that bottle-nosed dolphins have retia mirablilia and 'wounder nets' to protect vital organs from the effects of water pressure.
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