Answer:
When you put something under water, the water seems to bend the shape, so when Brian aims slightly below at an object, he can hit it.
Step-by-step explanation:
Refraction is the phenomenon of light and radio waves being diverted in passing obliquely through the interface between one medium and another. In fact, Brian is clever and inventive, since he figures out how to catch fish and lure them in with the guts from the previous fish.