Fathead minnows can allow, rather well, harsh disorders. It could inhabit waters that could be uninhabitable to other fish. Waste water drainage sites are an instance. Nevertheless, the contaminants in these scenarios may affect the minnows. There can be lowered procreative capacity.
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The fathead minnow has an alarm system that launches a material called Schreckstoff when certain cells are harmed in a strike. Then, this released material is discovered by the predator fish which then will certainly hide or dart away. This system aids fathead minnows realized potential predators. The fathead's primary killer is the north pike, as well as this chemical acknowledgment capability assists the minnow acknowledge its predators.