Fathead minnows are offered as feeder fish. A selection called "rosy-red minnows" is usually the kind cost aquariums. If relied on in aquariums, they have to remain in colleges of five or 6 or a solitary fish will come to be territorial as well as go after various other varieties of fish. Fathead minnows are likewise made use of as lure. You have probably either seen a fathead minnow in a fish tank, or relied on or seen one while angling.
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The fathead minnow has an alarm system that launches a material called Schreckstoff when particular cells are harmed in an assault. Then, this launched substance is identified by the killer fish which after that will conceal or dart away. This system aids fathead minnows acknowledge possible killers. The fathead's key killer is the north pike, and also this chemical acknowledgment capacity helps the minnow recognize its predators.