A type of fish scale or fish characterized by scales combining arm-like or brachial structures with ganoid-type scale characteristics.
From brachium (arm) plus ganoid (a type of ancient fish scale covered in shiny enamel). The term describes a hybrid scale type or fish with such scales.
Ganoid scales are among the most beautiful structures in fish evolution—they're coated in shiny enamel that gave prehistoric armored fish their gleaming appearance, and brachioganoid variations show how fish scales adapted to different environmental pressures.
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