Fathead minnows are sold as feeder fish. A range called "rosy-red minnows" is typically the kind cost fish tanks. If utilized in fish tanks, they should remain in schools of 5 or six or a solitary fish will certainly end up being territorial and go after other species of fish. Fathead minnows are also relied on as lure. You have probably either seen a fathead minnow in an aquarium, or made use of or viewed one while angling.
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The fathead minnow has an alarm system that releases a compound called Schreckstoff when particular cells are hurt in a strike. After that, this released element is sensed by the killer fish which then will certainly hide or dart away. This system aids fathead minnows identify prospective predators. The fathead's key predator is the northern pike, and this chemical acknowledgment capacity helps the minnow acknowledge its predators.