Oreochromis niloticus is the dominant species in freshwaters of South China.
尼罗罗非鱼（Oreochromis niloticus）是我国华南淡水中的优势种。
2
During millions of years' evolution, Gymnarchus Niloticus has gained a unique physique and special movement form, it can adapt to the underwater environment very well.
“尼罗河魔鬼”鱼经过数百万年的自然演化，具有独特的形体结构和运动方式，能很好地适应水生环境。
3
This paper studies the undulation control on the bionic device of long flexible fin based on undulation movement generated by the long flexible fin of Gymnarchus niloticus.