What is the deepest depth of an ocean?
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Aside from the guy from a different planet, you're all right.  Challenger Deep is the deepest point of the Mariana Trench in the Pacific Ocean.
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WHOI (Woods Hole Institute of Oceanography) has posted some bathymetry maps showing the highest points to be around 2500 meters (8366 feet) deep. However, the East Pacific Rise is a large area, so it is difficult to answer your question with much more than just an example. The base of the features on their maps is about 3000 meters (9842 feet). You can see the maps at:
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Whenever I am at the beach, I think about the vast world that exists beneath the ocean's surface. Though the marine life is interesting, the ocean floor is what really interests me.  The deepest known spot in the Pacific Ocean is the Marianna Trench, 36,198 feet below sea level. In 1960, the bathyscaph Trieste dove to a record depth in the Trench, plunging to 35,810 feet. The Atlantic Ocean is the shallowest ocean, with an average depth of 11,700 feet. The deepest known spot in the Atlantic Ocean is the Milwaukee Depth, at 27,493 feet below the surface in the Puerto Rico Trench. These trenches exceed the average depth of the ocean floor, reaching deep into the earth's surface.\n\nThat help at all? Next time, just use the Grammar check in your word program.
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There are indeed flatfish and shrimp in the deepest part of the ocean.  What kind of flatfish is, to my knowledge, unknown.\n\nThe Goblin shark reaches the bottom of the abysal planes, at about 1200 meters.  I don't know if any sharks have been found in the deep trenches, but it wouldn't surprise me.
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10,916 meters (35,814 feet), to Challenger Deep in the Marianas trench, which is the deepest known part of the Earth's oceans.  The Marianas trench is in the western north Pacific Ocean.  \n\nSee sources.
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(a) Largest city is seoul, population= 10,231,000\n(b) Largest reptile: it depends, some say Komodo dragon that weighs 300 pounds and 10 ft long,\nsome say australian salt water crocodile that reaches upto 23 ft in length, some say leather back sea turtle ie 8 ft long and weighs 1500 pounds.\n(c) Known deepest part of ocean is Mindanao Trench( west Pacific) 11516 meters deep. However, it is believed that Mariana Trench 11021m near Guam is the deepest part.. It was first pinpointed by HM survey ship Challenger in 1951.
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At 36,201 feet (11,034 meters) below sea level, Challenger Deep is the lowest part of the Pacific Ocean's Mariana Trench, located just east of the Philippines.\n\nThe water pressure is the equivalent of having about 50 jumbo jets piled on top of you. Yet even here life thrives, according to scientists who have pulled a plug of dirt from the seafloor.\n\nThe sample was taken from the Challenger Deep, which is nearly 7 miles (11 kilometers) deep. The soil was packed with a unique community of mostly soft-walled, singled-celled organisms that are thought to resemble some of the world's earliest life forms.\n\nThe sediment core was collected with KAIKO, JAMSTEC's remotely operated vehicle. Kitazato and colleagues report the discovery in tomorrow's issue of the journal Science.\n\nI doubt we will ever see the bottom!
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ur q is what is the deepest part of the ocean?and it is the deep sea trench.a deep sea trench is any long narrow steep sided depression in the ocean bottom in which maximum oceanic depths (24,000–36,000 ft, or 7,000–11,000 m) occur.The deepest known depression of this kind is the Mariana Trench. Most trenches occur at subduction zones, where one tectonic plate is thrust under another.\nmariana trench is aSubmarine trench in the floor of the western Pacific Ocean.\n\nIt is the deepest known depression on the surface of the Earth, with a maximum depth of 36,198 ft (11,033 m). The trench extends from southeast of Guam to northwest of the Mariana Islands, a distance of more than 1,580 mi (2,550 km), and has a mean width of 43 mi (69 km.
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Pacific Ocean.\n\nThe deepest point in the world's oceans is the Challenger Deep, in the Marianas Trench; its depth is 11.03 km (36,200 feet)
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300 meters (or 1000 feet) is about as far as a human being can go without the aid of a vessel. Dive depth records are a little over 300 m.\n\nThe Eiffel Tower is 300 meters tall, which is not very far at all considering how deep the ocean goes. The ruins of the Titanic, for example, are at a depth of 3,800 meters (which is about 2.5 miles). The pressure at that depth is over three tons per square inch - enough to crush you in an instant!
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The Marianas trench is the deepest part of the ocean.  It is 35,813 ft/10,915m deep.  If you cut Mount Everest off at sea level and put it on the ocean bottom in the Challenger Deep, there would still be over a mile of water over the top of it!
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They didn't know.\n\nPrior to SONAR, there was little available in the way of mapping the deep ocean. Beyond the continental shelves and the areas around islands, the ocean was simply known as ocean deep without knowing exactly how deep that was.  SONAR and RADAR allowed for mapping and discovery of the trenches and ridges on the deep ocean floor.
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mariana trench in the pacific ocean
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The Mariana Trench (or Marianas Trench) is the deepest known submarine trench, and the deepest location in the Earth's crust itself. It is located in the floor of the western North Pacific Ocean, to the east of the Mariana Islands at 11°21′N 142°12′E, which is near Guam. The trench is the boundary where two tectonic plates meet, a subduction zone where the Pacific Plate is being subducted under the Philippine Plate. The bottom of the trench is further below sea level than Mount Everest is above sea level.\n\nThe trench has a maximum depth of 10,911 m (35,798 feet) below sea level. Taking into account its latitude and the Earth's equatorial bulge, this puts it at 6,366.4 km from the centre of the Earth. The Arctic Ocean, on the other hand, is 4-4.5 km deep, which would put its floor at ~6,352.8 km from the Earth's centre, 13.6 km closer.\n\nIt was first surveyed in 1951 by the British navy vessel, Challenger II, which gave its name to the deepest part of the trench, the Challenger Deep. Using echo sounding, the Challenger II measured a depth of 5,960 fathoms (10,900 m) at 11°19′N 142°15′E. This sounding was repeatedly made using earphones to hear the return of the signal as the stylus passed across the graduated depth scale, whilst the timing of the speed of the echo-sounding machine, a necessary part of the process, was made with a hand held stopwatch. For these reasons it was considered prudent to subtract one scale division (of 20 fm) when officially reporting a new greatest depth of 5,940 fm (10,863 m).\n\nIn 1957, the Russian vessel Vityaz reported a depth of 11,034 m (36,201 ft), dubbed the Mariana Hollow; this measurement has never been replicated and is not considered accurate. In 1962 the M.V. Spencer F. Baird recorded a greatest depth of 10,915 m (35,810 ft). In 1984 the Japanese sent the Takuyo, a highly specialized survey vessel out to the Mariana Trench and collected data using a narrow, multi-beam echo sounder; they reported a maximum depth of 11,040.4 m1 (this is also reported as 10,920±10 m 2). The most accurate measurement on record was taken by another Japanese probe, Kaiko, on March 24, 1995: 10,911 m (35,798 ft) 3.\n\n \nJanuary 23, 1960: Just before the diveIn an unprecedented dive, the U.S. Navy bathyscaphe Trieste reached the bottom at 1:06 pm on January 23, 1960 with U.S. Navy Lt. Don Walsh and Jacques Piccard. Iron shot was used for ballast, with gasoline for buoyancy. The onboard systems indicated a depth of 37,800 ft (11,521 m), but this was later revised to 35,813 ft (10,916 m). At the bottom Walsh and Piccard were surprised to discover soles or flounder about one foot (30 cm) long, as well as shrimp. According to Piccard, "The bottom appeared light and clear, a waste of firm diatomaceous ooze".\n\nAt the bottom of the Mariana Trench, water exerts a pressure of 1086 bar (108.6 MPa or 15,751 psi).
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There are only 5 oceans:\nAtlantic\nPacific\nIndian\nArctic\nSouthern\n\nOcean Area (square miles) Average Depth (ft) Deepest depth (ft) \nPacific Ocean 64,186,000 15,215 Mariana Trench, 36,200 ft deep \nAtlantic Ocean 33,420,000 12,881 Puerto Rico Trench, 28,231 ft deep \nIndian Ocean 28,350,000 13,002 Java Trench, 25,344 ft deep \nSouthern Ocean 7,848,300 sq. miles (20.327 million sq km )  13,100 - 16,400 ft deep (4,000 to 5,000 meters) the southern end of the South Sandwich Trench, 23,736 ft (7,235 m) deep \nArctic Ocean 5,106,000 3,953 Eurasia Basin, 17,881 ft deep \n\n\nWhile some scientists claim there are five oceans, others claim there are only four or even three oceans.
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The Paific ocean\nThe deepest part of the ocean was first pinpointed in 1951 by HM Survey Ship Challenger in the Marianas Trench in the Pacific Ocean. On January 23, 1960, the US Navy Trieste vessel descended to the bottom of the Pacific Ocean, and on March 24, 1995, the Japanese probe Kaiko recorded a depth of 10,911 m (35,797 ft), the most accurate measurement yet taken.\nhttp://www.guinnessworldrecords.com/content_pages/record.asp?recordid=47619\nThe Pacific Ocean (from the Latin name Mare Pacificum, "peaceful sea", bestowed upon it by the Portuguese explorer Ferdinand Magellan) is the world's largest body of water. It encompasses a third of the Earth's surface, having an area of 179.7 million square kilometres (69.4 million sq miles). Extending approximately 15,500 kilometres (9,600 miles) from the Bering Sea in the Arctic to the icy margins of Antarctica's Ross Sea in the south (although the Antarctic regions of the Pacific are sometimes described as part of the circumpolar Southern Ocean) the Pacific reaches its greatest east-west width at about 5°N latitude, where it stretches approximately 19,800 kilometres (12,300 miles) from Indonesia to the coast of Colombia. The western limit of the ocean is often placed at the Strait of Malacca. The lowest point on earth—the Mariana Trench—lies some 10,911 metres (35,797 ft) below sea level.\nhttp://en.wikipedia.org/wiki/Pacific_ocean
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The deepest place is near the Mariana Islands in the Pacific. The water is over 36,000 feet deep in the Mariana Trench. That's over 7 miles deep. Mount Everest is only 6 miles high!