0_Wizard
Sharks are elasmobranch fish characterized by a cartilaginous skeleton, five to seven gill slits on the sides of the head, and pectoral fins
Sharks are a group of elasmobranch fish 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.
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Shark
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Shark
Sharks are a group of elasmobranch fish 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 holocephalid eugenedontidans. Under this broader definition, the earliest known sharks date back to more than 420 million years ago.
List of cartilaginous fish of Sri Lanka
Sri Lanka is a tropical island situated close to the southern tip of India. The diversity of fish fauna within the inland waterways and around the island is very high considering the small size of the island. Among the marine fishes, sharks and batoids (rays and skates) form a considerable diversity. A preliminary checklist of Sharks around Sri Lanka was compiled by marine biologist, ornithologist, astronomer and well known diver Rex I. De Silva in 1985. It is cited as the first most comprehensive catalogue to Sri Lankan cartilage fishes. On 2016 May, he published Illustrated guide of Sharks of Sri Lanka.
Fish anatomy
Fish anatomy is the study of the form or morphology of fishes. It can be contrasted with fish physiology, which is the study of how the component parts of fish function together in the living fish. In practice, fish anatomy and fish physiology complement each other, the former dealing with the structure of a fish, its organs or component parts and how they are put together, such as might be observed on the dissecting table or under the microscope, and the latter dealing with how those components function together in living fish. The anatomy of fish is often shaped by the physical characteristics of water, the medium in which fish live.
Fish fin
Fins are usually the most distinctive anatomical features of a fish. They are composed of bony spines or rays protruding from the body with skin covering them and joining them together, either in a webbed fashion, as seen in most bony fish, or similar to a flipper, as seen in sharks. Apart from the tail or caudal fin, fish fins have no direct connection with the spine and are supported only by muscles. Their principal function is to help the fish swim. Fins located in different places on the fish serve different purposes such as moving forward, turning, keeping an upright position or stopping. Most fish use fins when swimming, flying fish use pectoral fins for gliding, and frogfish use them for crawling.
Fish physiology
Fish physiology is the scientific study of how the component parts of fish function together in the living fish. It can be contrasted with fish anatomy, which is the study of the form or morphology of fishes. In practice, fish anatomy and physiology complement each other, the former dealing with the structure of a fish, its organs or component parts and how they are put together, such as might be observed on the dissecting table or under the microscope, and the later dealing with how those components function together in the living fish. Most fish exchange gases using gills on either side of the pharynx (throat).
Manta ray
Manta rays are large rays belonging to the genus "Manta". The larger species, "M. birostris", reaches in width while the smaller, "M. alfredi", reaches . Both have triangular pectoral fins, horn-shaped cephalic fins and large, forward-facing mouths. They are classified among the Myliobatiformes (stingrays and relatives) and are placed in the family Myliobatidae (eagle rays). Mantas are found in warm temperate, subtropical and tropical waters. Both species are pelagic; "M. birostris" migrates across open oceans, singly or in groups, while "M. alfredi" tends to be resident and coastal. They are filter feeders and eat large quantities of zooplankton, which they swallow with their open mouths as they swim.
Broadnose sevengill shark
The broadnose sevengill shark ("Notorynchus cepedianus") is the only extant member of the genus "Notorynchus", in the family Hexanchidae. It is recognizable because of its seven gill slits, while most shark species have five gill slits, with the exception of the members of the order Hexanchiformes and the sixgill sawshark. This shark has a large, thick body, with a broad head and blunt snout. The top jaw has jagged, cusped teeth and the bottom jaw has comb-shaped teeth. Its single dorsal fin is set far back along the spine towards the caudal fin, and is behind the pelvic fins. In this shark the upper caudal fin is much longer than the lower, and is slightly notched near the tip.
1_Apprentice
Well okay then! I know there are lots of different species as well -- and that they definitely get a bad rap!
0_Wizard
Today's shark is classified as  clade Selachimorpha which is not too different from ray
Modern sharks are classified within the clade Selachimorpha (or Selachii) and are the sister group to the rays.
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Shark
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Shark
Sharks are a group of elasmobranch fish 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 holocephalid eugenedontidans. Under this broader definition, the earliest known sharks date back to more than 420 million years ago.
List of cartilaginous fish of Sri Lanka
Sri Lanka is a tropical island situated close to the southern tip of India. The diversity of fish fauna within the inland waterways and around the island is very high considering the small size of the island. Among the marine fishes, sharks and batoids (rays and skates) form a considerable diversity. A preliminary checklist of Sharks around Sri Lanka was compiled by marine biologist, ornithologist, astronomer and well known diver Rex I. De Silva in 1985. It is cited as the first most comprehensive catalogue to Sri Lankan cartilage fishes. On 2016 May, he published Illustrated guide of Sharks of Sri Lanka.
Megalodon
Megalodon ("Carcharocles megalodon"), meaning "big tooth," is an extinct species of shark that lived approximately 23 to 2.6 million years ago (mya), during the Early Miocene to the end of the Pliocene. There had been some debate regarding the taxonomy of megalodon: some researchers argued that it was of the family Lamnidae and closely related to the great white shark ("Carcharodon carcharias"), while others argued that it belonged to the extinct family Otodontidae; presently, there is near unanimous consensus that the latter view is correct. Its genus placement is still debated, authors placing it in either "Carcharocles", "Megaselachus", "Otodus", or "Procarcharodon".
List of Plasmodium species
The genus "Plasmodium" is a member of the order Haemosporidia. It is the largest genus within this order and currently consists of over 250 species. They cause malaria in many different vertebrates. The species in this genus are entirely parasitic with part of their life cycle spent in a vertebrate host and another in an invertebrate host - usually a mosquito. Vertebrates infected by members of this genus include mammals, birds and reptiles. Host range among the mammalian orders is non uniform. At least 29 species infect non human primates; rodents outside the tropical parts of Africa are rarely affected; a few species are known to infect bats, porcupines and squirrels; carnivores, insectivores and marsupials are not known to act as hosts.
Fish
Fish are the gill-bearing aquatic craniate animals that lack limbs with digits. They form a sister group to the tunicates, together forming the olfactores. Included in this definition are the living hagfish, lampreys, and cartilaginous and bony fish as well as various extinct related groups. Tetrapods emerged within lobe-finned fishes, so cladistically they are fish as well. However, traditionally fish are rendered paraphyletic by excluding the tetrapods (i.e., the amphibians, reptiles, birds and mammals which all descended from within the same ancestry). Because in this manner the term "fish" is defined negatively as a paraphyletic group, it is not considered a formal taxonomic grouping in systematic biology.
Great white shark
The great white shark ("Carcharodon carcharias"), commonly known as the great white or the white shark, is a species of large mackerel shark which can be found in the coastal surface waters of all the major oceans. The great white shark is notable for its size, with larger female individuals growing to in length and in weight at maturity. However most are smaller, males measuring and females on average. According to a 2014 study the lifespan of great white sharks is estimated to be as long as 70 years or more, well above previous estimates, making it one of the longest lived cartilaginous fish currently known.
Zebra shark
The zebra shark ("Stegostoma fasciatum") is a species of carpet shark and the sole member of the family Stegostomatidae. It is found throughout the tropical Indo-Pacific, frequenting coral reefs and sandy flats to a depth of . Adult zebra sharks are distinctive in appearance, with five longitudinal ridges on a cylindrical body, a low caudal fin comprising nearly half the total length, and a pattern of dark spots on a pale background. Young zebra sharks under long have a completely different pattern, consisting of light vertical stripes on a brown background, and lack the ridges. This species attains a length of .
1_Apprentice
As in a manta ray? I didn't realize they were related in any way.
0_Wizard
Sharks  and their history  date back to more than 420 million years ago
Under this broader definition, the earliest known sharks date back to more than 420 million years ago.
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Shark
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Shark
Sharks are a group of elasmobranch fish 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 holocephalid eugenedontidans. Under this broader definition, the earliest known sharks date back to more than 420 million years ago.
Evolution of fish
The evolution of fish began about 530 million years ago during the Cambrian explosion. It was during this time that the early chordates developed the skull and the vertebral column, leading to the first craniates and vertebrates. The first fish lineages belong to the Agnatha, or jawless fish. Early examples include "Haikouichthys". During the late Cambrian, eel-like jawless fish called the conodonts, and small mostly armoured fish known as ostracoderms, first appeared. Most jawless fish are now extinct; but the extant lampreys may approximate ancient pre-jawed fish. Lampreys belong to the Cyclostomata, which includes the extant hagfish, and this group may have split early on from other agnathans.
Qinling orogenic belt
The Qinling orogenic belt is a tectonic feature that evolved throughout the Proterozoic and Phanerozoic eons due to a variety of tectonic activities. It is a part of the Central China Orogenic Belt, aligned in an East-West orientation across Central China, and spans portions of Shaanxi, Henan and Gansu provinces along the Qinling Mountains which are one of the greatest mountain ranges in China. The first materials involved in the Qinling orogenic belt formed around 2.5 billion years ago, whereas the main morphology of the belt now largely reflects the Triassic collision between the North China plate and the South China plate and Cenozoic extension across China.
Marine life
Marine life, or sea life or ocean life, refers to the plants, animals and other organisms that live in the salt water of the sea or ocean, or the brackish water of coastal estuaries. At a fundamental level, marine life helps determine the very nature of our planet. Marine organisms produce much of the oxygen we breathe. Shorelines are in part shaped and protected by marine life, and some marine organisms even help create new land. Most life forms evolved initially in marine habitats. Oceans provide about 99 percent of the living space on the planet. The earliest vertebrates appeared in the form of fish, which live exclusively in water.
Volcanology of Canada
Volcanology of Canada includes lava flows, lava plateaus, lava domes, cinder cones, stratovolcanoes, shield volcanoes, submarine volcanoes, calderas, diatremes, and maars, along with examples of more less common volcanic forms such as tuyas and subglacial mounds. It has a very complex volcanological history spanning from the Precambrian eon at least 3.11 billion years ago when this part of the North American continent began to form. Although the country's volcanic activity dates back to the Precambrian eon, volcanism continues to occur in Western and Northern Canada where it forms part of an encircling chain of volcanoes and frequent earthquakes around the Pacific Ocean called the Pacific Ring of Fire.
Human evolution
Human evolution is the evolutionary process that led to the emergence of anatomically modern humans, beginning with the evolutionary history of primates – in particular genus "Homo" – and leading to the emergence of "Homo sapiens" as a distinct species of the hominid family, the great apes. This process involved the gradual development of traits such as human bipedalism and language. The study of human evolution involves many scientific disciplines, including physical anthropology, primatology, archaeology, paleontology, neurobiology, ethology, linguistics, evolutionary psychology, embryology and genetics.
Phanerozoic
The Phanerozoic Eon (British English Phanærozoic) is the current geologic eon in the geologic time scale, and the one during which abundant animal and plant life has existed. It covers million years to the present, and began with the Cambrian Period when diverse hard-shelled animals first appeared. Its name was derived from the Ancient Greek words (phanerós) and (zōḗ), meaning "visible life", since it was once believed that life began in the Cambrian, the first period of this eon. The time before the Phanerozoic, called the "Precambrian" supereon, is now divided into the Hadean, Archaean and Proterozoic eons.
1_Apprentice
And where were the first fossils found?
0_Wizard
I guess no but the truth of the matter is that have diversified into over 500 species.
Since then, sharks have diversified into over 500 species.
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List of The Price Is Right pricing games
Pricing games are featured on the current version of the American game show The Price Is Right. The contestant from Contestants' Row who bids closest to the price of a prize without going over wins the prize and has the chance to win additional prizes or cash in an onstage game. After the pricing game ends, a new contestant is selected for Contestants' Row and the process is repeated. Six pricing games are played on each hour-long episode. Prior to expanding to one hour in length, three games per episode were played during the half-hour format. With the exception of a single game from early in the show's history, only one contestant at a time is involved in a pricing game.
Isopoda
Isopoda is an order of crustaceans that includes woodlice and their relatives. Isopods live in the sea, in fresh water, or on land. All have rigid, segmented exoskeletons, two pairs of antennae, seven pairs of jointed limbs on the thorax, and five pairs of branching appendages on the abdomen that are used in respiration. Females brood their young in a pouch under their thorax. Isopods have various feeding methods: some eat dead or decaying plant and animal matter, others are grazers, or filter feeders, a few are predators, and some are internal or external parasites, mostly of fishes. Aquatic species mostly live on the seabed or bottom of freshwater bodies of water, but some more derived taxa can swim for a short distance.
The Guess Who
The Guess Who are a Canadian rock band, formed in Winnipeg in 1965. Initially gaining recognition in Canada, the group found international success from the late 1960s through the mid-1970s with many hit singles, including "No Time", "American Woman", "Laughing", "These Eyes", "Undun" and "Share the Land". The band have continued to perform and record to the present day; and at various times have included many well-known musicians, including Burton Cummings and Randy Bachman (of Bachman–Turner Overdrive). Formed as a garage rock band, their musical style encompassed the pop rock and psychedelic rock genres.
Guess (clothing)
Guess (styled as GUESS or Guess?) is an American clothing brand and retailer. In addition to clothing for both men and women, Guess markets other fashion accessories such as watches, jewelry, perfumes, and shoes. Guess began in 1981 as a book of styles by Georges Marciano. Maurice, Georges brother, was first sought by Georges to help with product development. Armand and Paul, also Georges' brothers, were in charge of distribution and advertising, respectively. Armand ran distribution. Paul created the advertising, all of it in-house. Georges designed the clothes, burnishing Guess' signature style: stonewashed denim, lighter in color, softer and more form-fitting than the competitors.
Guessing
A guess (or an act of guessing) is a swift conclusion drawn from data directly at hand, and held as probable or tentative, while the person making the guess (the guesser) admittedly lacks material for a greater degree of certainty. A guess is also an unstable answer, as it is "always putative, fallible, open to further revision and interpretation, and validated against the horizon of possible meanings by showing that one interpretation is more probable than another in light of what we already know". In many of its uses, "the meaning of guessing is assumed as implicitly understood", and the term is therefore often used without being meticulously defined.
Gillian Guess
Gillian Guess (born 1955) is a Vancouver woman who was convicted in 1998 of obstruction of justice after becoming romantically involved with a murder defendant while she was a juror in his 1995 trial. Her case became significant because it set legal precedents in four areas of Canadian Law: it was the first case where a juror had sexual relations with a murder defendant during his trial; the only case where a juror has faced criminal sanction for the decision they have made; the only case in Canadian law where jury room discussions were made part of the public record. Regarding the sanctity of juror deliberations up until Guess was arrested, there was no law in Canada that made her actions illegal and more over, the procedures used in her trial may have violated Guess' rights under the Canadian Charter.
Mosquito
Mosquitoes are small, midge-like flies that constitute the family Culicidae. Females of most species are ectoparasites, whose tube-like mouthparts (called a proboscis) pierce the hosts' skin to consume blood. The word "mosquito" (formed by "mosca" and diminutive "-ito") is Spanish for "little fly". Thousands of species feed on the blood of various kinds of hosts, mainly vertebrates, including mammals, birds, reptiles, amphibians, and even some kinds of fish. Some mosquitoes also attack invertebrates, mainly other arthropods. Though the loss of blood is seldom of any importance to the victim, the saliva of the mosquito often causes an irritating rash that is a serious nuisance.
1_Apprentice
How many rows of teeth do they have?