Two Thai fishermen show off a 646-pound giant catfish they caught in the Mekong River in the Chiang Khong district of Chiang Rai Province in northern Thailand in mid-May 2005.
At the time of this 2007 photo, Japanese scientists had captured what may be the first images of a live giant squid.
A Cambodian fisherman holds a giant stingray fish on the Mekong River near the Cambodian/Vietnam border on Dec. 10, 2002.
Two giant ''echizen'' jellyfish are seen swimming in the Sea of Japan five meters below the surface off the Town of Echizen, Fukui Prefecture.
The 880-pound ocean sunfish, shown in this undated photo
returned to sea on Wednesday, Nov. 4, 1998. Aquarium spokesman Ken Peterson said that the sunfish had outgrown its exhibit.
Giant Pacific Octopus is considered very intelligent for an invertebrate.
Antarctic explorers hold a giant Macroptychaster sea star (starfish).
giant Japanese Spider crab is the world's largest marine crab
clipped from: abcnews.go.com 
