Photo: Sex-Changing Chemicals Found in Potomac River

Email to a Friend << Back to Full Story


Smallmouth bass, like the one shown above, are one of many fish species whose males are demonstrating distinctly feminine behavior. Male smallmouth bass are producing eggs in the Potomac River near Washington, D.C., and experts say chemicals in the water may be causing the condition.



Photograph courtesy U.S. Fish and Wildlife Service

EMAIL NEWSLETTER Photos and News of the Week

Get the top photos and news of the week from National Geographic News, plus occasional breaking-news alerts.

See Sample >>
Please enter a valid email address
Privacy Policy

MOST VIEWED NEWS

Oldest Skeleton in Americas Found in Underwater Cave?

Hanna, Hurricane Ike Take Aim at Eastern U.S., Bahamas

PHOTO IN THE NEWS: Black Hole Seen in Closest Look Ever
NEWS FEEDS    After installing a news reader, click on this icon to download National Geographic News's XML/RSS feed. After installing a news reader, click on this icon to download National Geographic News's XML/RSS feed.

Get our news delivered directly to your desktop—free.
How to Use XML or RSS

ADVERTISEMENT

NATIONAL GEOGRAPHIC'S PHOTO OF THE DAY

Today's National Geographic Photo of the Day

• Today's Photo

• Download as Wallpaper

Photo and Headline Widget

Put our latest news and photos on your Web page or desktop—automatically updates! See Sample
Download Widget