Fathead minnows could tolerate, rather well, severe disorders. It could live in waters that might be uninhabitable to various other fish. Waste water drainage sites are an instance. Nevertheless, the contaminants in these circumstances may influence the minnows. There could be lowered procreative ability.
The fathead minnow has an alarm that releases a material called Schreckstoff when specific cells are harmed in a strike. After that, this released compound is detected by the killer fish which then will certainly hide or dart away. This system aids fathead minnows acknowledge potential killers. The fathead's key killer is the north pike, and this chemical acknowledgment ability helps the minnow identify its killers.