Dogfish Sharks Essay Research Paper Classification of

Dogfish Sharks Essay, Research Paper

Categorization of Dogfish sharks

Kingdom Animalia ( animate beings )

Phylum Chordata

SubPhylum Vertebrata ( craniates )

Class Chondrichthyes ( cartilaginous fish )

Subclass & # 8211 ; Elasmobranchii ( sharks and beams )

Order & # 8211 ; Squaliformes ( dogfish sharks )

Family Squalidae

Genus Squalus

Speciess acanthias

Introduction

Sharks are fish that have been about longer so dinosaurs

hold existed. They live in Waterss all over the universe, in every ocean, and even in some rivers and lakes. Sharks, unlike other fish, have no castanetss ; their skeleton is made of gristle, which is a tough, hempen substance, non about every bit difficult as bone. There are many different species of sharks that range in size from the size of a individual & # 8217 ; s manus to bigger than a coach. Fully-grown

sharks range in size from 7 inches long to up to 50 pess long. The mean size of sharks is between 5 and 7 pess long and they have a assortment of organic structure forms. Most sharks have streamlined, torpedo-shaped organic structures that glide easy through the H2O. Some bottom-dwelling sharks have flattened organic structures that allow them to conceal in the sand of the ocean floor. Some sharks have an

elongated organic structure form, nebs, and tail fives, which they use to catch quarry. There are about 368 different species of sharks, which are divided into 30 households. These different households

of sharks are really different in the manner they look, live, and eat. They have different forms, sizes, colour, fives, dentitions, home ground, diet, personality, method of reproduction, and other properties. Some types of shark are really rare and some are really common ( like the dogfish shark ) . Sharks may hold up to 3,000 dentitions at one clip. Most sharks do non masticate their degree Fahrenheit

ood they gulp it in big pieces. The dentitions are arranged in rows ; when one tooth is damaged or lost, it is replaced by another. Most sharks have about 5 rows of dentitions at any clip. The forepart set is the largest and does most of the work. Sharks vary greatly in their diets, but they are all carnivores. Some like the dunce are fleet marauders that eat fish, calamari, other sharks, and marine mammals. Some are slow-swimming marauders that crush and eat shellfish from the ocean floor. Others are filter feeders that sieve bantam spots of plankton and little animate beings from the H2O as they swim with unfastened oral cavities. They eat immense sums of these bantam animate beings and workss. Sharks live in oceans and seas all over the universe, and even in some rivers and lakes, particularly in warmer Waterss. Some sharks live near the surface, some unrecorded deep in the H2O, and others live on or near the ocean floor.

Some sharks live in comparatively warm Waterss ( dunces, bull sharks, and tiger sharks ) . Other sharks, such as the thrasher, mako, basking and bluish shark, live in temperate H2O ( which is neither hot nor cold ) . Others, including the dogfish, unrecorded in cool Waterss. Some sharks stay in the same part their full lives while others travel across oceans. There are three different types of sharks when it comes to migratory forms: Local sharks & # 8211 ; these sharks do non migrate, and scope merely about a 100 stat mis from their home ground. Examples include the bull shark, shovelhead shark, and the nurse shark. Coastal pelagic sharks & # 8211 ; these sharks can migrate over 1,000 stat mis ( 1,600 kilometer ) . Examples include the twilight shark, the tiger shark, and the sand bar shark. Highly oceanic sharks & # 8211 ; these sharks migrate across oceans. Examples include the bluish shark and the mako.

Scientists have shown that sharks are comparatively intelligent and

can larn at a rate similar to that of rats and birds

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