The fathead minnow has an alarm that releases a substance called Schreckstoff when certain cells are hurt in a strike. After that, this launched element is discovered by the killer fish which then will certainly conceal or dart away. This system assists fathead minnows realized potential predators. The fathead's main killer is the northern pike, and this chemical recognition capacity assists the minnow recognize its predators.
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Fathead minnows are marketed as feeder fish. A range called "rosy-red minnows" is generally the type cost fish tanks. If relied on in fish tanks, they should remain in schools of 5 or 6 or a single fish will certainly become territorial and chase after various other species of fish. Fathead minnows are also utilized as lure. You have probably either seen a fathead minnow in an aquarium, or made use of or seen one while fishing.