abyssal zone organisms?
964964
Abysso-pelagic or hado-pelagic: angler fish, shrimp, rattail fish, brotulid fish, eelpout fish, anemone, silica sponge,sea cucumber\nhttp://people.whitman.edu/~yancey/deepsea.html#diagram\nhttp://people.whitman.edu/~yancey/fish.html\nhttp://people.whitman.edu/~yancey/cnidaria.html\nhttp://people.whitman.edu/~yancey/echinoderms.html\n\nOrganisms that live at vents in the abyssal zone: tubeworms, shrimp, crabs, mussels, chemo-autotrophic microbes, Archaea \nhttp://web.mit.edu/12.000/www/m2005/a2/finalwebsite/environ/bio/index.shtml
44151
Let's see...\nEchinoderms (technically it's not exactly an exoskeleton, but for practical purposes it could do)\nCrustaceans\nMollusks\nsome Annelids\nmm this is making me hungry...
467236
All of them... or, none of them.\n\nIt all depends upon your notion of "facinating". \n\nCertainly humans have the ability to synthetically "adapt" temporarily to many environments, but there is also a plethora of creatures that are far more specialized than we:\n\nIce Worms live in glacial water\n\nSome tube worms live near ocean vents in amazingly extreme conditions, such animals have been found to transcend (near) boiling to (near) freezing water.\n\nArchaea is a bacteria group that has species which can live off of sulfur (or Iron, or such) and need no oxygen to survive.\n\nHyperthermophiles are another bacteria group within Archaea that survive in temperatures above 100 degrees C (~200 degrees F)\n\nThe Wood Frog, Rana sylvatica, can be Frozen solid (as in an ice cube) for months and survive the ordeal fine.\n\nWater Bears, Tardigrada, live in droplets of water and can survive for tens of years in a hibernate-like state \n\nI would bet this could be a very long list...
113307
Archaebacteria include those hearty lil' bastards that love extreme conditions: Hyperthermophiles (live in extreme heat), Extreme halophiles (live in extremelely salty environs, like the Dead Sea), Methanogens (methane-producers), etc.\n\n5 examples:\n\n-Dunaliella salina--an extreme halophile that inhabits the Great Salt Lake in Utah\n-Methanocaldococcus jannaschii--an methanogen that inhabits volcanic vents on the ocean floor\n-Thermus aquaticus--Sulfobale found in sulfur-rish hot springs in Yellowstone Nat'l Park, used for it's polymerase enzymes (Taq polymerase) that function at high heats for use in DNA labs.\n-Thermoplasma acidophilum--a chemoorganotroph that lives in the highly acidic conditions found on self-heating coal refuse piles.\n-Archaeoglobus fulgidis--a sulfate reducing hyperthermophile found near volcanic vents on the ocean floor.\n\n\nEubacteria: these are the "true bacteria."\n\n-Escheria coli--bacteria that lives in the gut of mammals.\n-Derxia gummosa--a nitrogen-fixing bacteria that lives in soil.\n-Acetobacter aceti--a bacteria that metabolizes ethyl acholhol into vinegar, used in commercial vinegar production.\n-Lactobacillus delbreckii--the bacteria used in the production of yoghurt from milk.\n-Synechococcus lividus--a type of cyanobacteria (formerly called blue-green algae), which produce most of the world's oxygen and live in the oceans.
264541
I read recently in a weekly magazine that there are 230,000 oceanic and 1.5 million non oceanic (land + air + lakes + river) classified species. According to the same article there would be around 1.5  to 2 millions not classified species in the oceans alone.\nI don't consider this magazine very higly and it did not state its sources.\nBut anyways, I would guess less than 3 million in all.
587146
I would have to say the Maldive Islands. There is far more marine life than anywhere else. Coral, manta-rays, sharks, turtles, eels can be encountered on a single dive... awesome!
1029931
The ocean is so deep that no one has made it to the bottom and lived as of yet. \n\nHow cool is that. There area so many kind of sea life we haven't discovered yet. Hay there may even be some very very big sea creatures down there ..... Woooooo wooooooo
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There are many links here, including a link to Scripps Oceanographic institue and a section with links, Marine Education (way down at the "m"s-an alphabetical list).\nhttp://www.csulb.edu/library/subj/ocean.html
689653
amoeba\nand i think cynobacteria \neuglena might be not, but im not sure
759009
Don't know for sure, but at the rate global warming is going we're all going to find out!\n\nScientists have speculated that there are life-forms that have not been in contact with the surface  for 15 million years on the bottom of Lake Vostok. The Earth's heat and the pressure/insulation of miles of ice above it keep the Lake Ontario sized body of water from freezing, like the oceans on Europa. No one really knows what is down there because drilling down with current technology would contaminate the lake with surface microbes and change whatever ecology is down there before people can study it.\n\nhttp://www.bbc.co.uk/science/horizon/2000/vostok.shtml\n\nMy guess is just a whole lot of very durable microbes, although some truly strange higher life could be down there if there are hydrothermal vents that would make regular vents seem normal.
332808
Living micro-organisms have been found flourishing deep within the ice of Antarctica. Since ice freezes at 32 degrees Fahrenheit, I expect that's as cold as you can get and still allow the little beggars to move about, ingest nourishment and procreate. These are simple single-celled animals. Microbia.
2193
Mariana Trench http://www.marianatrench.com\n\nMore information can be obtained from Wikipedia http://en.wikipedia.org/wiki/Mariana_Trench
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The dead sea in israel is 400m below sea level have a look at that.\n\nThere are some bacteria living in crude oil reserves underground check thos out.\n\nThe other animals that live and work far underground are miners. Have a look for the world's deepest mines to see what they live through.
683367
skin and organs which are adapted to face damn high pressure\nsome bacteria to produce artificial light\nuses fluorescent tentacles to lure prey.\n\nThe deep sea is also an extremely hostile environment, with pressures between 20 and 1,000 atmospheres (between 2 and 100 megapascals), temperatures between 3 and 10 degrees Celsius, and a lack of carbon dioxide.\n\nIt has also been found that the deeper a fish lives, the more jelly-like its flesh and the more minimal its bone structure. This makes them slower and less agile than surface fish.
1146931
They are arachnids, not crustaceans. Easy to find on the Indian Ocean shores. Dead animals eaters. Breath using gills, two sexed animals, egg layers, free swimmers. Outstanding feature: their blood is used as a reactive in a positive detection of human encephalitis.\n\nmore info: Barnes book of invertebrates
623235
The three zones of the ocean are \nSunlight zone\nanimals and plants that live close to the surface of the ocean. Sunlight is in abundance here. Examples of plants and animals at this level: plankton, seaweed(red, brown), fish such as dolphins, sharks, etc. \n\ntwilight zone\nPartial sunlight at this level of the ocean. Animals and plants at this level: kelp, whales, seals, etc. \n\nmidnight zone\nno light at this level. Animals and plants at this level survive from "chemical light"- bioluminescence
1180202
Spinner Baits, Slugos, Deep Diving Rapalas. It all depends how warm the water is. The warmer it is, the deeper they go.