fathead minnow

noun
1.
a North American cyprinid fish, Pimephales promelas, having an enlarged, soft head.
Also called fathead.
Examples from the web for fathead minnow
  • 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.