The King of Lakes

The Lungfish refers to a huge amphibious fish-like creature found in the largest lake in the 22ndnd Floor of Aincrad that was classified as the King of the Lake. It could only be encountered by using a special bait that looked like a lizard and required a very high fishing skill to lure the fish, while a very high strength skill to draw the fish out of the lake. It had the ability to swim as well as walk on land.

Aincrad Arc
Nishida, a well known professionally skilled fisherman, requested Kirito to help in catching the fish as he has the fishing skills to catch it but lacks the strength to pull the creature out of the water. Nishida got the fish and then «switched» with Kirito. Kirito managed to heave the thing out of the water but it turned out to be enormous. It started chasing Kirito, but was then killed by Asuna using her high level sword skill.

Dipnoi Lungfish