A Stickleback Minnow.    It’s almost the same Stickleback some of you Tropical Fish hobbyists buy for your community tank.  (This site is a work in progress.  Maybe very slow progress.  I have several other minnow pictures, but I am having trouble identifying them.  My bible for this is Colorado’s Little Fish by John Woodling.  It is a Colorado Division of Wildlife publication.)

Stickleback Minnow

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