Rock-climbing fish caught in evolution tug-of-war | Science News



Support credible science journalism.

Subscribe to Science News today.


Rock-climbing fish caught in evolution tug-of-war

Short is good for scaling waterfalls, but tall is better for evading predators along the way

9:04pm, January 5, 2009

BOSTON — Evolution has stuck Hawaiian fish called stream gobies between a rock and a scary place.

A Sicyopterus stimpsoni goby shorter than a thumb has to climb the rocks of waterfalls, sometimes several hundred feet high, on a juvenile migration upstream. But to reach those falls, the fish has to pass through a kill zone of lowland waterways full of predatory fish, explains Richard Blob of Clemson University in South Carolina.

This article is available only to subscribing members. Join the Society today or Log in.

Get Science News headlines by e-mail.

More from Science News

From the Nature Index Paid Content