Fathead minnows could endure, fairly well, extreme problems. It could populate waters that may be uninhabitable to various other fish. Waste drainage websites are an example. Nonetheless, the contaminants in these scenarios may have an effect on the minnows. There can be reduced procreative ability.
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The fathead minnow has an alarm that releases a substance called Schreckstoff when particular cells are hurt in an assault. After that, this released element is spotted by the killer fish who after that will conceal or dart away. This system assists fathead minnows identify potential killers. The fathead's primary predator is the north pike, and this chemical recognition ability assists the minnow recognize its killers.