: Unlike the overlapping "shingle-like" scales of common fish, ganoid scales are rhomboidal and connect via peg-and-socket joints . This creates an interlocking, nearly impenetrable surface that is highly resistant to predators.
: While technically a ganoid fish, its scales have become significantly thinner and more flexible, resembling the cycloid scales of modern fish. Evolutionary and Cultural Significance ganoid fish
: Each scale consists of three distinct layers: a bony basal layer, a middle layer of dentine (similar to human teeth), and a hard, enamel-like outer layer called ganoine . : Unlike the overlapping "shingle-like" scales of common
: In these species, the scales are often modified into large, bony plates called scutes rather than a full body covering. Evolutionary and Cultural Significance : Each scale consists
The defining feature of these fish is their scales, which act like a suit of chainmail.
: Due to their thick, bony nature, these scales make the fish's body relatively rigid compared to more modern teleost fish. Representative Living Species
: Found in Africa, these fish are some of the most primitive living ray-finned fishes.