the first pic is legit, giant mekong catfish, caught in nets.
4th picture, boonie is right, a whale shark.
the 5th picture, 642 pound giant mekong catfish. caught in a net in thailand. by these two guys. i saw the actual footage. a net was strung across the entire river. took 15 people to get on shore. largest catfish ever caught.
recently a goonch catfish was landed , to set the new world record on rod and reel. but the weight escapes me right now.
splash, a fish kept that weighed 125 pounds when caught was caught in texas, on a rod, and reel. was the largest american caught catfish, a giant blue. it was kept in a huge texas aquarium, for years, and was set to be rereleased and died unexpectedly.