Fact: The Great Yarmouth Sea Life Centre in Norfolk, England, gives its Green turtles brussels sprouts as a Christmas treat.
Fact: Brussels sprouts kind of make you gassy.
Fact: In 2008, the bubbles produced by sprout-induced turtle farts triggered overflow alarms in the middle of the night.

"Now the Yarmouth turtle tank—12 feet in depth and width holding 250,000 litres of water along with George the 3-ft-long green turtle—has been partially emptied for the festive season. Thousands of litres have been removed to lower the water by a six inches and keep the sensitive alarms clear."

Phew.
The Telegraph: Aquarium lowers water levels after feeding turtles brussel sprouts
(Via BoingBoing)