Fish have nostrils called nares that lead to sensitive organs of smell so fish can find food. The nostrils are not used for breathing purposes.
Fish move water quickly over their sensory pads to pick up chemical signals. The sensory pads send these signals to the brain, and the brain then interprets them. The brain gives the fish chemical cues that allow it to take action, depending on the information. The signals serve as an alert system for both food sources and nearby danger. Gills are what the fish use to breathe; gills take in water and absorb oxygen from it.Learn More
The most common disease to cause a fish to swim sideways is swim bladder disease. This "disease" is a actually a broad term for a variety of symptoms such as swimming sideways, upside down and leaning to one side.Full Answer >
By definition, fish are animals that live in water, have gills and lack limbs. They are also chordates, which means they have a backbone-like structure that provides support for the body and acts as an anchor for the major muscles.Full Answer >
Contrary to popular belief, betta fish can live with other fish as long as only one male betta is in the tank. If two male bettas are housed together, they fight.Full Answer >
Blood parrot fish, the aquarium fish commonly called parrot fish, should be housed only with mid-sized non-aggressive fish such as tetras, danios, angelfish and catfish. Aggressive species should be avoided because parrot fish cannot compete well for food.Full Answer >