Catfish Eats Basketball:
In this scenario the Hoax is: Catfish eats basketball (stuck in its mouth).
Though catfish can grow to be huge, even gigantic fish with extremely wide mouths, it's not everyday that we see a catfish was an enlarged basketball stuck in its mouth while on the deck of your lakefront home/cabin. In this experience a man and wife were on the lake when they saw a basketball gliding across the water (looking odd). When they got close to the basketball they noticed it was gulped inside of a large mouthed catfish.
Using the Scientific Thinking Principle #3 Falsifiability; that is, (capable of being disproved) I believe my self that a catfish of the right size (gigantic) could produce the ability to hold an 8 inch basketball within the grasp of his mouth. But without trying this experiment on a (gigantic) catfish ourselves we have no information to make us believe this isn't photoshopped in this day and age.
Using the Scientific Thinking Principle #2 Correlation vs. Causation:
(variable a=b, Variable b=a, or variable c=a/variable c=b)
Aside from the ability of others to use the newest of technologies to make an image of such sort, I believe people would do such a thing to a catfish as to gain a few laughs. Putting an 8 inch basketball in a catfish's mouth, can seem to be funny to some people I would assume. In this scenario Variable C (people/person) equating variable A (the basketball in the catfish's mouth). Here's how I believe the basketball was placed in the catfishes mouth. After catching a (gigantic) catfish someone could have opened the catfish's mouth put a basketball right inside and drop the fish back into the water and left, making the next person to see it next think instantly that the catfish grasped with its mouth as if it though it was food. Not only could a person have done this and left the catfish for others to see, but the person who took these photos and made them viral on the internet could have done this him/herself for public humor, self humor etc. Not only is this a sick and disgusting thought, but the basketball that was inside the catfish's mouth was not allowing the catfish to dive back down into the water. So the man and wife who came across this catfish has to pop the basketball to deflate it so the gigantic catfish could dive back into the deep water where he hopefully lives to this day.