Harbor seals' whiskers as good at detecting fish as echolocating dolphins, researchers find

ScienceDaily (2010-06-13) -- Seals use their whiskers to track hydrodynamic trails left by passing fish, but how sensitive are the whiskers? Testing the responses of a seal to trails left by an artificial fin, researchers found that seals can detect trails up 35 seconds after a fin has passed. Fish can cover hundreds of meters in that time, so the whiskers compare well with the performance of echolocating whales and dolphins.
http://www.sciencedaily.com/releases/2010/06/100610191044.htm