24 AUGUST: BERLIN, GERMANY – Louis, a five-year-old French boy, holds a Louisiana crawfish, or Procambarus clakrii, in the Tiergarten park in Berlin, Germany. Popular features in local aquariums, the crustaceans, also known as crayfish, freshwater lobsters, crawdaddies, mountain lobsters, yabbies and mudbugs, are not native to Germany. Conservationists believe they arrived in the park as a result of people emptying their aquariums there.

(Photo credit: Adam Berry/Getty Images)