Check out this video from National Geographic in which a liger supercat has been engineered by mating a male lion with a female tiger. [youtube]http://www.youtube.com/watch?v=CD6vpheUoPE[/youtube] At 900 lbs, supercat Sinbad dwarfs the mighty Bengal Tiger's average weight of 520 lbs, a full 380 lbs heavier. In fact, at 900 lbs, Sinbad weighs roughly the same as both his father and mother combined! Despite a liger's obvious physical dominance, they only exist in captivity as tigers and lions would never voluntarily mate in the wild, and further, live in different regions and environments. ...

Commentary is a little bit corny but it's still an impressive feat from this octopus that manages to squeeze through a gap just a few inches wide.