The results have shown that the cumulative mortality ratio of Asian bumblebee catfish at the end of 24 h challenge was 100% at pH = 11, at pH = 10, and at pH = 3. No mortality of fish was observed at pH = 4, 5, 6, 7, 8, 9 after 24 h of the challenge. | Effects of water pH on physiological parameters and color changes of Asian Bumblebee Catfish Pseudomystus siamensis Regan 1913