Dolphin Vs Carcharias

In the modern world it is known by many people that over the course of Earth's existence it has changed dramatically. This also applies to the creatures that inhabit Earth, they have all evolved over the course of their existence. Sharks have been roaming the earth for over 450 million years, in this extensive time period, there have been many things that have changed since modern day. There are many different reasons on why the evolved, and also how sharks managed to completely change themselves in the course of 450 million years. The life for a shark millions of years ago is going to be a lot different than if they were in the modern world, and this goes for all creatures on earth, because they evolve and adapt to the constant changing world. There are many different traits in sharks right now than there were myrietes ago. Humans have only been in contact with sharks for a tiny part of their existence but have had a huge impact on the way they act

The Common Bottlenose Dolphins (Tursiops Truncatus) are probably the most popular species of dolphins around. Coming under the order of Cetecea and the family of Delphinidae, the bottlenose dolphins are closely related to whales and are highly intelligent creatures (source 7). They are widely distributed around the world in the deep tropical and sub-tropical seas as well as other warm regions. For this reason, there is no recorded global estimate of the number of Bottlenose Dolphins in this world. According to source 9, it is regarded as a common cetacean, and too large and strong to be captured by accident.

jaw structure. The teeth are actually modified, enlarged placoid scales. The teeth aren’t anchored in the jaw; they are just embedded on the gums. Unfortunately, when the great white shark eats on its prey, it sometimes loses or breaks the tooth by the flesh. Luckily, sharks have developed a special feature that enables it to replace its missing tooth. They have developed rows of teeth, each tooth moving up to replace the missing one. A whole broken row of teeth can be replenished, just like a conveyor belt. Each tooth, though, has a different shape, changing according to its necessity. The great white has triangular, serrated-edged teeth anywhere from one to two inches long. With this feature, the shark is able to tear through the flesh for its meal. The jaw of the shark is made up of strong bone tissue. It must be very powerful because the shark is designed for feeding.

Bottlenose Dolphins are a very interesting animal. They have a fusiform (Spindle shaped) body that allows them to move quickly in the water. Because of the Dolphins’ shape they have bilateral symmetry. They also have a dorsal fin, flippers, and a fluke. However, Bottlenose Dolphins do not have ears on the outside of their bodies, hair, or hind limbs. The color of this type of dolphin is usually a light grey color to a black. Their stomach is white and sometimes has a pink hue. One physical adaptation these dolphins have is a telescoped skull. The skull is like this because it allows them to breathe more easily while swimming. Bottlenose Dolphins also have blubber that they use as insulation and vascular shunts that allow them to have cooling for certain types of organs and tissues in their bodies. Finally, Bottlenose Dolphins have sharp teeth that let them grasp onto their prey, so their tongue can push the prey down the dolphin’s throat. Bottlenose Dolphins have a range mass of 260 to 500kg which is 572.69 to 1101.32 in pounds. The average mass of the Bottlenose Dolphin is 400kg. Their average mass in pounds is 881.06.

The features of a Great White Sharks are really interesting like their skin patterns. Their skin patterns help them camouflage in the water. The top of their body is blue to blend in the water. The bottom of the body is grey to blend in with the black color on the bottom of the ocean. The teeth of Great White Sharks are interesting. They have multiple rows of teeth. Their teeth are triangled shaped and have

David and Melba Caldwell were the first investigators postulating that signature whistles may represent a unique vocalization, different for each dolphin. These stereotyped whistles seem to be stable for a long time (Sayigh et al. 1990, 2007; Bruck, 2013; Luís et al., 2015), suggesting that these signals may be involved in individual identification (Caldwell & Caldwell, 1965; Tyack 1986; Caldwell et al., 1990; Sayigh et al., 1990; dos Santos et al., 2005).

Dolphins have been around a lot longer than humans. They originated about 50 million years ago. The most common dolphin, being the bottlenose dolphin, has been around for 15 million years. Surprisingly, dolphins originated from members of the cetaceans group. Cetaceans used to be land mammals but evolved into being aquatic mammals. In From Land to Water it stated, “The transition from land to water is documented by a series of intermediate fossils from India and Pakistan.” This research helps prove how they used to be land mammals but evolved to live in the ocean. Dolphins are one out of many aquatic mammals who need oxygen, but they need water in order to live. Believe it or not, dolphins are somewhat related to hippos, camels, deer, cattle, and giraffes. In From Land to Water, “ Many features that are

A shark has multiple rows of teeth. The mouth of sharks is in the front of the head. In some species, sharks teeth are replaced as much as once a week. Some sharks have teeth used to crush and grind. These are some what like what humans have. They also have sharp teeth. These can be compared to incisors that humans have. These types of teeth are very important to sharks because they are carnivores and depend on their teeth in order to eat their prey. A sharks body in covered by scales which cover their bodies. These scales make the skin of a shark very rough and strong.

This fat body leads directly to the bulla, producing a sound path to the ear

A bottlenose dolphin’s diet typically consists of mainly fish. Dolphins usually hunt in groups but can also hunt independently. They use echolocation to help them while hunting. By making clicking sounds and waiting for return echoes, dolphins are able to determine how far away the nearest object is, and also the shape of the objects nearby. This is not only useful in hunting, but it also to allows them to discover when a predator may be nearby.

Dolphin Ancestry This essay will be able Dolphins and how they have changed over time. I will talk about how long and how much they have changed. This will also be about their habitat and why and how they moved to the water. I will talk about how social they are and, how they are socialize a lot. So come with me on this journey and find out what I have to say about dolphins.

Transition: After learning about a dolphin’s sense of communication, we can now build upon this information by examining their unique behavior.

In the deep, dark, spooky ocean lives a gut-wrenching and petrifying great white shark. This monster of the deep swims menacingly in search for its prey and devours its meal without leaving a single scrap of morsel. Then, there is the pilot fish, the great white’s dependable companion, who works as its dentist. The pilot fish will swim into the mouth of the shark and clean its enormous jaws from harmful parasites. In return, the great white shark will provide the pilot fish with food and protection from its predators.

They have 300 serrated teeth, a torpedo shaped body and swallow their prey whole. Can anyone one tell me what sea creature this is? Yes. It’s the Great White Shark.

Bottlenose dolphins are one of thirty-two species of marine dolphins (World Book 297). Their scientific name is Tursiops Truncatus. Males are usually longer and heavier than females. Bottlenose dolphins can grow to be thirteen feet long and weigh up to 600 pounds (Bottlenose Dolphins). This makes bottlenose dolphins the largest of the beaked