From the satirical "news" site The Onion:
SEATTLE - After repeatedly gorging itself on marine sea life for more than seven years, a severely obese chinook salmon told reporters Wednesday he had grown too overweight to swim upstream and reproduce.
“I used to be able to swim hundreds of miles to my natal stream,” the male salmon said as he recovered in a brackish estuary after swimming several feet against the current and growing fatigued. “But now I’m so fat I can’t even leap out of the water to overcome a natural obstacle. And when I try, my fins are super sore for a couple days.”