Male fish, that is. National Geographic reports that male bass in the Potomac River are producing eggs. Seventy-nine percent of the male smallmouth bass examined by scientists show both testicular and ovarian tissue.
"The findings have perplexed the government scientists, who suspect a little-understood class of emerging contaminants. The contaminants include natural hormones excreted by humans and livestock as well as hormone-mimicking synthetic chemicals. The chemicals appear to confuse the endocrine systems of fish, essentially fooling males into producing female cells."
