Photos of zooplankton observed by traditional morphological methods referred from Rotifer World Catalog [46]. A: Brachionus angularis Gosse, 1851; B: Brachionus diversicornis (Daday, 1883); C: Keratella cochlearis (Gosse, 1851); D: Brachionus forficula Wierzejaki, 1891; E: Brachionus quadridentatus Hermann, 1783; F: Keratella cochlearis (Gosse, 1851); G: Trichotria tetractis (Ehrenberg, 1830).