Fig. 9

Displays a semithin section of the gill arch of the Ruby-Red-Fin Shark, scientifically known as Epalzeorhynchos frenatum, a Teleostei: Cyprinidae family member. The epithelia of the gill arch contained Goblet cells that possess a significant abundance of metachromatic mucus production. Granular rodlet cells are situated within the lymphatic space (L)