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All Your Megalodon Shark Facts And Stats Are Here. The megalodon shark (Carcharodon megalodon) was a massive being that would put modern day sea predators to shame. If you are currently afraid of the great white shark, then I’m sure you’re happy that you don’t have to worry about the megalodon creeping up under your sailboat. This colossal being was not one to mess with, and although the megalodon is now extinct, its memory most definitely deserves to be respected and well known.

How scientists know about this giant prehistoric beast. Just like the sharks of today, these sharks were comprised mainly of cartilage. So even though these sharks were immense, the majority of their bodies were not fossilized; cartilage usually disintegrates too fast for the fossilization process to occur. Therefore, there are still many factors of the megalodon that we are unsure of. Luckily, some teeth have been found and investigated. Because of this, paleontologists have managed to uncover quite a few facts about these amazing creatures, and although many specifics are still being debated, there are a few things that most are definitely in agreement on.

Megalodon Shark On Shark Week. Widely accepted facts. From 7. 0 million to 1. Earth. Based on what researchers have discovered, the megalodon had many physical and behavioral similarities to the great white shark; however, one of the main differences between the two was that the megalodon was substantially more menacing and intimidating. The average great white can be anywhere from 1. Yes these lengths are pretty impressive, but it does not even compare to the megalodon shark.

The exact lengths of these ancient sharks are still in discussion, however, we do know that the megalodon was approximately 4. They are also known as the “megatooth” shark and was the largest carnivorous fish that has ever existed on Mother Earth. Scientists have studied megalodon teeth that were found in Africa, North America, South America, India, Australia, Japan, and Europe.

Based on the locations that these teeth were unearthed, it is the firm belief that they thrived in the world’s warmer waters. As mentioned earlier, scientists are still trying to uncover particulars of this prehistoric shark, including their diet. Since the great white shark is a descendant of the “megatooth” shark, most believe that the diet of the great white shark reflected that of the megalodon.

However, based on the serration marks found on the “mega” teeth of the ancient shark, it is believed that they also fed upon whales. A possible reason for extinction. Yes, the megalodon shark is extinct. Unfortunately, due to the fact that not much information has been determined regarding these incredible beings, the absolute reason of why they all died off is unknown. There are a few theories that would explain the extinction of these animals, however.

Two of the main speculations actually coincide with the belief that these sharks swam in warm waters. During the time when these sharks were still living, the temperature of the oceans began to decrease. The oceans’ steadily increasing colder temperatures may very well be what killed off the megalodon shark. Another plausible belief is that the ancient shark’s preferred prey began to migrate to colder waters.

These low temperature waters were probably too cold for the megalodon to survive. Is the Megalodon Shark still alive? Interestingly enough, there are many who refuse to believe that the megalodon shark is indeed extinct. Skeptics feel as if the megalodon shark may possibly be in existence deep down in the ocean. While it is true that we have not explored every inch of the world’s oceans, and it is likely that there are undiscovered species living in the depths of the waters, the belief that the megalodon shark may still be alive today has yet to be proven. Sharks are known for shedding hundreds of teeth on a regular basis; if the megalodon shark was still alive, they would be expected to shed the most teeth out of all of these sharks. Every megalodon tooth that has been found is ancient.

Until a fresh megalodon tooth, a “megatooth” shark sighting, or some other form of proof has been presented, it is determined that this ancient shark is most definitely extinct. Page Created By: Mike Rogers. From Megalodon Shark to Types of Sharks. From Megalodon Shark to the Shark Sider Homepage.

Shark - Wikipedia. Sharks are a group of elasmobranchfish characterized by a cartilaginous skeleton, five to seven gill slits on the sides of the head, and pectoral fins that are not fused to the head. Modern sharks are classified within the clade. Selachimorpha (or Selachii) and are the sister group to the rays. However, the term "shark" has also been used for extinct members of the subclass Elasmobranchii outside the Selachimorpha, such as Cladoselache and Xenacanthus, as well as other Chondrichthyes such as the holocephalideugenedontidans. Under this broader definition, the earliest known sharks date back to more than 4. Acanthodians are often referred to as "spiny sharks"; though they are not part of Chondrichthyes proper, they are a paraphyletic assemblage leading to cartilaginous fish as a whole.

Since then, sharks have diversified into over 5. They range in size from the small dwarf lanternshark (Etmopterus perryi), a deep sea species of only 1.

Rhincodon typus), the largest fish in the world, which reaches approximately 1. Sharks are found in all seas and are common to depths of 2,0. They generally do not live in freshwater although there are a few known exceptions, such as the bull shark and the river shark, which can survive and be found in both seawater and freshwater.[2] Sharks have a covering of dermal denticles that protects their skin from damage and parasites in addition to improving their fluid dynamics. They have numerous sets of replaceable teeth.[3]Well- known species such as the great white shark, tiger shark, blue shark, mako shark, thresher shark, and hammerhead shark are apex predators—organisms at the top of their underwater food chain.

Many shark populations are threatened by human activities. Etymology. Until the 1. This is still evidential in several species termed "dogfish," or the porbeagle.

The etymology of the word "shark" is uncertain, the most likely etymology states that the original sense of the word was that of "predator, one who preys on others" from the Dutch schurk, meaning "villain, scoundrel" (cf. A now disproven theory is that it derives from the Yucatec Maya word xok, pronounced 'shok'.[7] Evidence for this etymology came from the Oxford English Dictionary, which notes shark first came into use after Sir John Hawkins' sailors exhibited one in London in 1.

Modern sharks began to appear about 100 million years ago. Fossil mackerel shark teeth date to the Early Cretaceous. One of the most recently evolved families is the. It’s cake versus ice cream for Splatoon 2's first Splatfest and we’re streaming all the fun live on our Twitch channel. Come and join the mayhem! Watch free 600 Free Live TV Channels. See 45000 Complimentary movies TV shows and documentaries. Record Local TV zero cost. View Horror Movies at no charge! Spoilers. Obviously. Released this past weekend, director Johannes Roberts’ 47 Meters Down brought a truly nightmarish premise to the big screen. During a shark. The Megalodon Shark is one of the most debated sharks in history. Is it alive? Was it EVER alive? How big were they, exactly? Learn that and more here.

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Caribbean Sea. However, the Middle English Dictionary records an isolated occurrence of the word shark (referring to a sea fish) in a letter written by Thomas Beckington in 1. New World etymology.[8]Evolution. Evidence for the existence of sharks dates from the Ordovician period, 4. Only scales have been recovered from the first sharks and not all paleontologists agree that these are from true sharks, suspecting that these scales are actually those of thelodont agnathans.[9] The oldest generally accepted shark scales are from about 4. Silurian period.[9] The first sharks looked very different from modern sharks.[1. The majority of modern sharks can be traced back to around 1.

Most fossils are of teeth, often in large numbers. Partial skeletons and even complete fossilized remains have been discovered. Estimates suggest that sharks grow tens of thousands of teeth over a lifetime, which explains the abundant fossils. The teeth consist of easily fossilized calcium phosphate, an apatite. When a shark dies, the decomposing skeleton breaks up, scattering the apatite prisms. Preservation requires rapid burial in bottom sediments. Among the most ancient and primitive sharks is Cladoselache, from about 3.

Paleozoic strata in Ohio, Kentucky, and Tennessee. At that point in Earth's history these rocks made up the soft bottom sediments of a large, shallow ocean, which stretched across much of North America. Cladoselache was only about 1 metre (3. Its teeth had several pointed cusps, which wore down from use. From the small number of teeth found together, it is most likely that Cladoselache did not replace its teeth as regularly as modern sharks.

Its caudal fins had a similar shape to the great white sharks and the pelagic shortfin and longfin makos. The presence of whole fish arranged tail- first in their stomachs suggest that they were fast swimmers with great agility. Most fossil sharks from about 3. The Xenacanthida was almost exclusive to freshwater environments.[1. By the time this group became extinct about 2. The other group, the hybodonts, appeared about 3.

The results of a 2. Megalodon (top two, estimated maximum and conservative sizes) with the whale shark, great white shark, and a human for scale. Modern sharks began to appear about 1.

Fossil mackerel shark teeth date to the Early Cretaceous. One of the most recently evolved families is the hammerhead shark (family Sphyrnidae), which emerged in the Eocene.[1.

The oldest white shark teeth date from 6. In early white shark evolution there are at least two lineages: one lineage is of white sharks with coarsely serrated teeth and it probably gave rise to the modern great white shark, and another lineage is of white sharks with finely serrated teeth. These sharks attained gigantic proportions and include the extinct megatoothed shark, C. Like most extinct sharks, C. This giant shark reached a total length (TL) of more than 1.

C. megalodon may have approached a maxima of 2. Paleontological evidence suggests that this shark was an active predator of large cetaceans.[1. Taxonomy. Sharks belong to the superorder Selachimorpha in the subclass. Elasmobranchii in the class. Chondrichthyes. The Elasmobranchii also include rays and skates; the Chondrichthyes also include Chimaeras. It is currently thought that the sharks form a polyphyletic group: some sharks are more closely related to rays than they are to some other sharks.[1. The superorder Selachimorpha is divided into Galea (or Galeomorphii), and Squalea (or Squalomorphii). Watch About Scout Online Mic.

The Galeans are the Heterodontiformes, Orectolobiformes, Lamniformes, and Carcharhiniformes. Lamnoids and Carcharhinoids are usually placed in one clade, but recent studies show the Lamnoids and Orectoloboids are a clade. Some scientists now think that Heterodontoids may be Squalean. The Squaleans are divided into Hexanchoidei and Squalomorpha. The Hexanchoidei includes the Hexanchiformes and Chlamydoselachiformes. The Squalomorpha contains the Squaliformes and the Hypnosqualea. The Hypnosqualea may be invalid.

It includes the Squatiniformes, and the Pristorajea, which may also be invalid, but includes the Pristiophoriformes and the Batoidea.[1. There are more than 4.