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Pectoral Fins Lower Jaw
1,728 wordsThe hump-back whale gets it's name from the distinctive hump in front of the dorsal fin and from the way it raises it's back high above water before diving. They are a member of the order Cetacea. This order is of aquatic mammals and the hump-back belongs to the suborder of the Mysticeti. The Mysticeti are the baleen whales which have three families and several species. The family in which the hump-back belongs is the Balaenopteridae, the true fin backed whale. The thing that separates this genu...
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Spineless Dorsal Fins Basking Goblin Crocodile Megamouth Thresher Sharks
3,474 wordsDifferent Types of Sharks INTRODUCTION Although sharks belong to the class Chondrichtyes, there are many different types. Sharks arose about 350 million years ago and have remained virtually unchanged for the past 70 million years and still comprise a dominant group. It is thought that sharks almost certainly evolved from placoderms, a group of primitive jawed fishes. It took a long series of successful and unsuccessful mutations with fin, jaw positions etc to give us all the different designs o...
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Pectoral Fins Fibrous Tissue
1,093 wordsDolphins are sleek Dolphins Dolphins Dolphins are sleek and powerful swimmers found in all seas. Dolphins are distinguished from porpoises by well-defined, beak-like snouts and conical teeth. There are at least 32 species of dolphins. Typical examples are the bottle-nosed dolphin, a popular performer in sea aquariums, and the common dolphin, which inspired many Mediterranean folk legends. Both often appear in open waters. Several freshwater species inhabit river estuaries in Asia and South Ameri...
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Pectoral Fins Lower Jaw
2,006 wordsTo look up into the mountains and see the steam rolling from a mountain stream on a cold winters morning is a beautiful sight. However, to look out over the horizon and see the white spray of salt water coming from the blow of a huge hump-back whale is much more exciting sight and a whole lot warmer. I lived in the mountains of Colorado for most of my childhood. The first time I had the opportunity to see the ocean was on a vacation to California, when I was about 15 years old. It was even bette...
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Unlike Other Rays Member Of The Ray Family Fins
639 wordsStingrays Rays and their close relatives skates are common in Australian waters; there are at least 50 species that are found all around the Australian coastline. Rays are broad flat fish with a thin tail and have many characteristics of sharks, as they are related to them. For example they have no scales, swim bladder or bones; their skeleton is made up of cartilage. Unlike sharks they have blunt teeth, which allows them to crush the shells of shellfish. Stingrays usually live on the seabed whe...
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