They stay in deeper warmer water and move allot and eat a lot of bait food
The reason both of these are valid scientific hypotheses is because A) scientists with different educational backgrounds may put forth different hypotheses to explain the same data.
This approach in science is vital in making progress and has helped to explain many phenomena in the past. When scientists explain data using different approaches, they come to a more comprehensive conclusion.
Photosynthesis is an example of how people and plants are dependent on each other.
