Biome Chain Food Freshwater

It is believed that between 1500 to 2000 species of characins exist. They can be found throughout South and Central America, as well as southern Texas and much of Africa. They are arguably the most popular type of fish in the aquarium hobby.

Physical Characteristics of Characins

Most characins possess teeth and are carnivorous, but there are many that are also omnivorous and herbivorous. They also possess a distinctive adipose fin along the tail before the dorsal fin. However, characins and tetras lack barbels or whiskers, as well as hard spines in the dorsal and anal fins.

Special care should be made to place aquariums containing characins in quiet, low-traffic

environments. Characins are capable of hearing high-frequency sounds because they possess a small chain of bones that connects their air bladder to the inner ear. As a result they are very sensitive to movement and sound, and can be easily stressed by disturbances.

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