Dive In The Giant Ocean Tank In New England Aquarium

How do deep sea fish and other creatures survive the pressure of the ocean?

The simple answer is that fluids are incompressible, whereas air (in the sub) is not.There are four phases of matter: solid, liquid, gas, and plasma. Solids and liquids have a constant physical volume, and that volume does not change regardless of the pressure. Gasses and plasmas expand to fill whatever volume they are contained within, and the pressure they exert is determined by their density within their container and their pressure.Now, a submarine is basically a metal container filled with air, and there is just enough air in a submarine to exert the atmospheric pressure at sea level. If the sub goes underwater, the amount of air within it does not change (unless there is a leak, of course), so the pressure within the sub remains the same. The pressure outside the sub, however, is determined by the depth. As a result, you have a tremendous difference in the pressure inside the sub (which pushes the walls of the sub outward), and the pressure outside it (which acts to crush it). If the difference is too much that the net pressure is too great for the walls of the sub to withstand, it collapses.A deep sea animal, on the other hand, contains no air; its blood is liquid and its flesh solid. It is under the same colossal pressure from the weight of the water, but since the material that it is made of is incompressible, it exerts the same pressure back, holding it up.Imagine you and a friend on 2 sides of a swinging door. If your friend pushes on the door, even a little harder than you are pushing the door, the door will open toward you. If you are both pushing an equal amount, it doesn't matter how hard you are both pushing, the door won't move.Sourced from : UCSB Science Linep.s. Fishes breath dissolved oxygen through gills so there are no lungs or air in their body to collapse with one exception. A mammal, namely the Sperm whale has a flexible ribcage so that it's lungs can expand or shrink freely without killing it due to pressure differences while diving and surfacing. All in all, deep sea creatures have evolved to live in those conditions. If you bring deep sea creatures to the surface, they'll probably explode and die. Kidding. Well, sorta… They will die of massive tissue damage because their insides will push out towards the lower pressure surroundings.It is as another Quoran said, they have no bladder at all, or at least have one that is filled with fat. So it will not kill the fish even under extreme pressures.Hope this answers your question. :D

What is the most terrifying underwater creature for you?

Sarpa salpaYou're out fishing, and pull up one of these funny looking fish. They're commonly eaten, so you decide to take it home for dinner.You fry the fish up in a little butter, add a pinch of salt and pepper, your preferred seasonings, a dash of lemon, serve over couscous. You finish eating dinner, and retire to the couch to watch TV.After you finish the first program, you start to feel a bit funny. Everything seems a bit sharper, you feel a bit distant, there's a slight pressure behind your eyes. You think to yourself, maybe I shouldn't have drank that second glass of wine.You fill a glass with water, maybe that will help. The next program is an episode you've seen a dozen times. Why does it seem so unfamiliar? You take a sip of the water, and realize it tastes blue.Suddenly, you realize not only does the water taste blue, but you hear and smell the sound emanating from your TV. The world breaks into a kaleidoscope of motion and color, you lose control of your thoughts, a sense of panic takes over, and all hell breaks loose.You've just become the victim of ichthyoallyeinotoxism, hallucinogenic fish intoxication which resembles the effects of psychedelic tryptamines such as psilocybin mushrooms.Over a dozen species of fish have been shown to have hallucinogenic properties. The chemicals responsible have yet to be identified, but the effects are believed to be related to a buildup of the algae Caulerpa prolifera or the seagrass Posidonia oceanica.What separates Sarpa salpa from the majority of these fish is that it doesn't typically cause hallucinogenic effects, and is commonly eaten.Big teeth and venom are frightening, but being unknowingly drugged with a psychedelic after sitting down for dinner is truly terrifying.