Just as we have a left and a right Lung, fish have left and right gills, so they all have two sets of gills.The average is two because the number of gills for all fish is two
Fish Use Gills Instead of lungs. Gills Help fish to Breath. Fish Use Gills Instead of lungs. Gills Help fish to Breath.
all fish have gills
There is not enough Oxygen in the air for the fish to breath. Water has just the right amount of air (O2) that the fish need and in the right proportions. Fish breath in water with gills. Water is capable to holding within it a very large amount of Oxygen. So it is super-concentrated. But the O2 in our air is far less concentrated then in water, so the fish try to gulp the air through and into their gills, but the gills cannot easily find or absorb the O2 from the regular, unpressurized air.
yes all fish have gills.
gills.
All fish have gills. Their gills are like lungs. And if they didn't have gills they would die.
gills
gills
Sea otters do not have gills because they are mammals.
Fish use gills to extract oxygen from the water passing over the gills.
Fish can sleep...and btw all fish have gills
Fish breathe using their gills. Gills are respiratory organs that extract oxygen from the water and release carbon dioxide. Water passes through the fish's mouth and flows over the gills, allowing the fish to absorb oxygen from the water.