Fig. 13

Displays a semithin section of the gill filament of the Ruby-Red-Fin Shark, scientifically known as Epalzeorhynchos frenatum. This species is classified under the Teleostei: Cyprinidae family. T. The gill filament comprises granular rodlet cells (shown by double arrowheads) and transitional rodlet cells (indicated by arrowheads), as well as mature rodlet cells (indicated by a red arrowhead)