fathead minnow

a North American cyprinid fish, Pimephales promelas, having an enlarged, soft head.
Also called fathead.
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Effects of fathead minnow colonization and removal on a prairie wetland ecosystem.
The fathead minnow is a stubby, heavy-bodied fish, usually olive to gray above which shades to straw color or white on the belly.
The fathead minnow test measures whether the discharge effects the growth rate of the minnow.
Fathead minnow egg production as a function of the number of females per spawning chamber.
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