Sand kind of behaves like water when it's dry, so sandniggers must have at least some rudimentary skills. Nogs flail about until they wear out and sink to the bottom - except the mega fat ones. They wade out in the water until the bouyant force forcefully rotates them upside down. Their fat folds then invert further shifting their new center of gravity lower under water. Their last views are of their friends in similar predicaments, so everything looks normally oriented to them. The fish on the other hand are fully revolted and swim away as fast as possible.
@Anticlutch Bonus points earned for forcefully forcing force and forcefully together. May the force be with you.