Most cichlids are characterized by beautiful colors and markings. Even within the same species different shades and patterns can develop a phenomenon that is called polymorphism.
There is such a variety of shapes and sizes among the many cichlids species that even experience fanciers of aquarium fishes often are surprised. Thus, the “giant” within the family measure from 28 to 32 inches (70-80cm), whereas the smallest members are fully grown at as little as 1.4 inches ( 3.5cm).

The body shapes of various species also vary tremendously. Most cichlids have typical slender fish shape, but in different species this shape can be vary from “normal” to “pencil shaped” a few species are high backed, that is, they have steeply arched backs; and some, like the popular discus fishes, are almost completely round and flat.