how do fish fish breath?? i heard they don`t have lungs???
448554
they use gills. the gills are filled with lots of blood vessels.  the fish draws in water from the mouth, which passes by and out the gills. as the water moves by, the blood cells take in oxygen and the waste gases are released.
934358
I couldn't possibly tell you about your fish.  However, I CAN tell you that your question is in the wrong section.  Try posting it in PETS>Fish...you might get a better response.  This section is for HUMAN illnesses and conditions!
457640
From the fishy smell? lol
474094
No, they are not fish...the following was taken from Yahoo!\n\nhttp://ask.yahoo.com/ask/20030507.html\n\nTrue fish are vertebrates and belong to the Chordata phylum of the animal kingdom. This group encompasses most of the animals we are familiar with, such as mammals, birds, reptiles, and amphibians, as well as humans. \nStarfish, or sea stars as they are sometimes called, are invertebrates, meaning they have no backbone. These spineless (and we mean that in the best possible way) creatures belong to the spiny-skinned phylum of animals known as Echinodermata and the class Asteroidea.
332737
This is interesting question. My opinion is: why not!! Maybe some forms of life that we don't know. There is some life forms even 11 km under the sea, under extremely high pressure. Some kinds of bacteria live without air too. Fish don't use the same air like us, but they are alive. There is so many different forms of life even on planet Earth, so why not on other planets? After all, if we did not see something, don't mean this don't exist!
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.
411135
I think, and my marine physiology is rather out of date, that if a swim bladder was so packed with air that it would be unable to hold any more, the fish would be forced to the surface because of increased buoyancy, unless it expended a huge amount of energy to counter that (think 'swim down' from Finding Nemo, but have them doing it all the time).  If the swim bladder was unable to take in any air at all, and was somehow kept empty, the perch would sink unless it made the effort to keep itself at a certain depth.
1101435
Smell, or olfaction, as scientists call it, is an important sense for many fish. Those little holes that look like nostrils are called nares. Nares don't lead to the throat the way nostrils do in mammals, but open up into a chamber lined with sensory      pads. Not all fish move water in and out through these nares in quite the same ways, but key to a strong sense of smell for fish is the ability to move water rapidly over these sensory pads. Some fish can pick up chemical signals when immobile by      pumping water through their olfactory system via tiny hairs called cilia. Other fish can pump water by a muscular movement. Some fish, such as smaller species of mackerel, have an olfactory system that requires them to swim in order to get water      moving through their nares. When the sensory pads pick up chemical signals, they transmit them to the fish's forebrain, which interprets the signal and incites the fish to respond appropriately.
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.
841523
I do believe most fish do have ribs, I will not say all of them do...................................................
745467
Dolphins do breathe air, but their skin/eyes/other stuff would dry out and eventually they would die
993746
Fish and sea creatures have a swim bladder.  This is an organ that inflates/deflates to hold their pressure and keep them afloat.
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.
645428
As with all other mammals, fetus do not breathe, but instead are passed oxygenatedblood through the placenta. Hence, before they are born they have no need for their lungs.\n\nHope this helps.\n\nJ
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!!!
1013531
They will do it by passing the water over their gills. Fish gills are full of blood vessels containing carbon dioxide. Through the process of osmosis, the small oxygen atom that makes up the water molecule is absorbed into the bloodstream and exchanged to carbon dioxide.
572951
one word answers?\n\nwell, organs of breathing\nbirds/human/snake/frog are all lungs\nfish is gills\n\nmovment\nbirds: flight\nhuman: walk\nfish: swim\nfrog: jump\nsnake: slither