Why do fish die when they are taken out of water?
98703
Not all fish do die when taken out of water. Some fish can survive indefinitely out of water provided they are kept moist with rain or dew.\n\nOf those fish that do die the most common cause of death is suffocation. \n\nFish mainly extract oxygen form the water through their gills. The gills of fish consist of hundreds of thousands of tiny strands, almost like hair. Have you ever seen someone with long hair underwater and noticed that the hair floats out from the head? Well underwater the gill filaments behave the same way. In the water those strands float apart and the fish is able to to extract oxygen from every one of them. \n\nWhen the fish is taken out of water the gill flaments collapse.  Look at a perosn with striaght hair when they climbs out of the water and notice how the hair all sticks together in a sheet? The gills of a fish behave the same way. On dry land the gill filamens of the fish all stik togather. Instead of being able to extract oxygen from each one it can only extract oygen form the ones in the surface layer. That just can't provide the fish with enough oxygen and it suffocates.\n\nContrary to popular belive fish don't technically die because they can only extract oxygen form water. Fish could breath air just fine if the gill filaments didn't collapse. \n\nIOW fsh die on land because air can't support their bodies the way that water can.
564928
If I'm understanding correctly, landlocked means they are isolated from all other bodies of water, such as rivers, other lakes, etc. I'd say they have to spawn, because if they didn't, they would not reproduce and, therefore, there would be no more little fishies. Unless they could have come from another body of water, I say yes.\n\nNot sure about the fry, though.
825541
Water boarding wouldn't work.  You'd need to pull the fish out of the water and make it think it was dying that way.  Then they'd talk.  We have no choice but to use that technique, because some fish somewhere knows the details of a plot to explode a nuclear weapon on US soil.
306007
Fire away, as said before, there are no dumb questions.\n\nFish don't float because they are heavier than water, without the air pockets. They take in water in to go down and discharge water to go up, like a submarine.\n\nIf just sitting there and not going up or down is called neutral buoyancy. Fish then weighs the same as the water.
680219
Aligators clamp down on the victim and then drag them underwater. Death can come from blood-loss or the basic trauma of being ripped apart by those teeth and jaw, but the idea is to drown them.  You'll see croc's and gators on the animal shows biting (clamping down) and then rolling into/under the water with them still in the jaw.  After death, then the victims are eaten.  A gator's jaw is so powerful that the clamping down can easily break bones and then facilitate easier swallowing of the carcass.
393229
If yer talking andromadous fishy fishing, fish generally hold in tidewater until the tide goes out. It is then their noses pick up the smell of the rivers they were born in and they  think .... "there it is Let's GO!"\n\nFis such as these rely on smell to find their way home. Once on the way, the are not going to let anything stawp them. Even whats on the end of your hook can infuriate them so much, they will attack it just out of anger.\n\nSometimes it a subtle tap tap tap....other times its a jerk so strong your pole tip hits the water and it is at this time you can yell, FISH ON !
1035087
Oxygen is carried in the blood.  The oxygen transfers from the atmosphere to your blood through an exchange in your lungs...\n\nA fish's gills accomplish the same thing, but they get the oxygen from the water.
519851
Fluids are not compressible and since most sea creatures cells/bodies are fluid, they are not affected by the pressure.  Air however is compressible so if the had lungs filled with air, they would have increase the amount of air in the lungs as they dove or get crushed.  Fish with swim bladders have to gradually increase the air in these bladders, if you catch one and reel him up from let's say 200', he is very dead by the time he makes it to the surface as the bladder ruptures as the air expands.
1139765
I'm sorry for your loss.  \n\nIt depends on a lot of things.  How full of air the lungs were, amount of body fat, what the body was wearing, a rate of decomposition (which varies).  Also if the skin was broken, water could enter the body, thus increasing its density and allowing it to sink.\n\nAlso affecting buoyancy are salinity and temperature of the water.
205693
Yes, because when dead people are in water their bodies swell causing them to float to the surface. Then they are free to attack anyone on the surface. If you pop them though, man, look out.
1172622
Simple... fish can breathe in water, as Oxygen is dissolved in the water already. Otherwise, its dangerous for the fish to breathe above water.\n\nn order to live, fish must extract oxygen from the water and transfer it to their bloodstream. This is done by gills, lungs, specialized chambers, or skin, any of which must be richly supplied with blood vessels in order to act as a respiratory organ. Extracting oxygen from water is more difficult and requires a greater expenditure of energy than does extracting oxygen from air. Water is a thousand times more dense (heavier per unit volume) than air, and at 20 deg C (68 deg F) it has 50 times more viscosity (resistance to flow) than air and contains only 3% as much oxygen as an equal volume of air. Fishes, therefore, have necessarily evolved very efficient systems for extracting oxygen from water; some fishes are able to extract as much as 80% of the oxygen contained in the water passing over the gills, whereas humans can extract only about 25% of the oxygen from the air taken into the lungs.\n\nGills are made efficient in a number of ways. (1) A large surface area for gaseous exchange means that more oxygen can enter the bloodstream over a given period of time. A single gill of a bony fish consists of a curved gill arch bearing a V-shaped double row of gill filaments. Each filament has many minute folds in its surface, giving it a sort of fuzzy appearance and increasing the amount of surface area along a given length of filament. Consequently, the surface area of the gills is commonly 10 to 60 times more than that of the whole body surface. (2) A short diffusion, or travel, distance for the oxygen increases the rate of oxygen entry into the blood. The blood traveling in the folds of the filaments is very close to the oxygen-containing water, being separated from it by a very thin membrane usually 1 to 3 microns (4/100,000 to 1/10,000 in) thick, and possibly less. (3) By using countercurrent circulation in the gill, the blood in the filament folds travels forward, in the opposite direction to the water flow, so that a constant imbalance is maintained between the lower amount of oxygen in the blood and the higher amount in the water, ensuring passage of oxygen to the blood. If the blood were to flow in the same direction as the water, oxygenated blood at the rear of the gills would be traveling with deoxygenated water and not only could not extract oxygen from the water but would even lose oxygen to it. (4) Gills have little physiological dead space. The folds of the filament are close enough together so that most of the water passing between them is involved in the gas-exchange process. (5) Water flows continuously in only one direction over the gills, as contrasted with the interrupted, two-way flow of air in and out of lungs of mammals.
230069
depends on the fish,a lot of fish will die if the leave their usual environment,but salmon and eals travel half the globe .\n Salmon work their way way up into the mountqain streams to spawm,\ntropical fish are  delicate and will die already because of the change in temperature of the water\n\nWATER HIGH UP IS MUCH COLDER THAT BELOW.
518066
Put a fish in the water and see if it dies, if it doesnt then there is oxygen in the water. If it does then shame you have to buy another fish!!!
1110243
Cut the line. The hook will dissolve in the fishes stomach or digestive tract. If it is stuck in the gills and bleeding you might as well pull it out cuz he's as good as dead. If you are fishing in a strictly catch and release lake, river or pond then I would definitely cut the line cuz you might get in trouble for riping out the fishes guts. When you rip out the hook the fish dies. Tell your hubby to knock it off and buy some new hooks!!! Happy Fishing
519170
if there is too much oxygen, that will over excite the fish and they can die. That is the case with everything. even if we are exposed to excess oxygen, we can die
881373
The swim bladder controls the buoyancy of the animal. Normally the amount of gases in the swim bladder keeps the fish neutrally buoyant, and they can regulate these gases to go up or down in the water column.\nThis saves energy because the fish doesn't have to swim actively to stay in one place; even though their tissues are denser than water, they won't sink because the less dense gases compensate for this.
58566
if u r talking about over-fish of waters it will make the fish population drop too far and they will eventually all die out