«Male
rainbow darter fish are really colorful,» Servos says.
There, he studies the effects of water pollution on
rainbow darter fish.
When scientists cut open this male
rainbow darter, they found it had inappropriately made eggs (round yellow features).
Some male
rainbow darters exposed to these pollutants produced eggs in their testes.
At least once a year from 2007 to 2012, his team caught and examined
rainbow darters at a site downstream of a water treatment plant.