The primary use for piscicides is to eliminate a dominant species of fish in a body of water, as the first step in attempting to populate the body of water with a different fish.
They are also used to combat parasitic and invasive species of fish.
Examples of piscicides include rotenone,[1][2] saponins, TFM, niclosamide and Antimycin A (Fintrol).
[3] Historically, fishing techniques of indigenous people around the world have frequently included the use of plant-based piscicides.
The genera Tephrosia, Wikstroemia, and Barringtonia are well known as fish poisons.