Fish are heading for extinction through sheer stupidity

A study by Swedish piscatologists has found that young fish of a number of species prefer plastic scraps to real food. Fishlings living in water containing microplastic; i.e. scraps less than 0.2" across; will gobble them up in preference to plankton, which actually contain nutriments. The change of diet stunts growth, makes the young fish more vulnerable to predators and reduces their breeding rate if they make it to adulthood. Clearly, this is an example of evolution in action and extinction by natural selection.