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Blood transports oxygen nutrients and wastes in mammals and fish .
The kidney filters waste from the blood stream and body for urinary excretion.
Fish, like humans, have kidneys which regulate the water and salt content of the body. This process is often referred to as filtration, though in fact it is a combination of several complex processes.
they float because they are clever
Filters keep the water clean for the fish, kind of like we need clean air to breath properly. Also, filters keep the tank clean by (yep you guessed it) filtering the water. I hope this helped^^
Fish tank filters are not too expensive to keep using. Most of the money goes towards the initial cost of all equipment. You will probably spend about $20 a year on fish filters if you change them as often as you should. P.S., change the filter once a month.
Haven't you seen finding nemo?!
There are a number of places where one can purchase filters for a fish tank. They can be purchased at pet supply stores, such as Pet Smart, and online on websites such as Amazon.
What about Blood Parrot Fish?
air pumps or filters
how are parts of birds & fish similar in structure & function
chunky soup