Sitting crosslegged Wang seemed to be more interested in the formation than fishing.
That is understandable anyway, as one can indeed allow his survival ability in this world to be increased.
In that case, he forgot about the fishing hook, but underwater there was a fish that didn't let it off.
The fish seemed too big for the hook it just swallowed it. At the same time, its internal organs were rapture due to it.
If Wang had pulled the fishing rod out he could have obtained great benefits but in the end, he forgot about it.
The fish ended up dying from it, after struggling for a while and other giant fish were attracted to the sight.
Some fish seem to prey on smaller ones but that does not mean they can't capitalize on each other.
In that case, they quickly went ahead to consume the huge dead fish, but Wang was not even aware as his eyes were busy staring at the huge formation that seemed to contain everything just like a world.