Fish can survive in frozen water because only the surface of the water freezes; the fish are able to live life as normal at lower depths beneath the ice. Oxygen is trapped beneath this ice layer, and fish and other creatures living in the water can live quite comfortably despite the frozen surface layer.Know More
Although water in lakes and rivers is generally colder the deeper one goes in the summer, in the winter, the exact opposite is true; the deeper down one submerges, the warmer the water temperature is. This is due to a phenomenon regarding how water molecules arrange themselves.
The frigid water beneath the ice allows fish to sustain life, thanks to key components of underwater survival in winter: metabolism, oxygen and food. Even though oxygen is present in the water, with less light penetrating the water, levels of oxygen drop off. Fish are cold-blooded creatures, however, and they can readily adapt their metabolism to withstand their environments. Fish alter their activity levels, with some staying somewhat active, others moving sluggishly and some hunkering down for the winter with barely no movement at all.
If cold temperatures persist for long periods of time, some fish may die. This is because the oxygen level gets too low to sustain life. This is called "freeze out" or "winterkill," and it is a natural phenomenon.Learn more about Fish
Fish can drown in water if there is not enough oxygen in the water. Water can run out of oxygen if fish overpopulation uses up the oxygen. Fish require a consistent intake of oxygen to survive. Their gills absorb oxygen from water molecules as water passes through the gill membranes.Full Answer >
Fish, like nearly all living organisms, need to consume water in order to survive. However, fish do not feel thirsty in the same way that humans do. Instead, their bodies have an efficient process that allows them to maintain hydration.Full Answer >
Ice is the solid form of water that is created when water freezes at a temperature of zero degrees Celsius, so it has the same chemical formula of water, which is H2O. Water consists of two atoms of hydrogen and one atom of oxygen.Full Answer >
Betta fish can breathe oxygen both from the water through their gills and directly from the air above the surface of their bowls for small periods of time. The fish can live for a short period of time in oxygen-deficient water though they thrive in small aquariums. Betta fish were first spotted in Southeast Asia, where they live in rice paddies, drainage ditches and flood plains.Full Answer >