In the book hatchet why is brian not able to hit the fish with his arrow?

In "Hatchet," Brian struggles to hit the fish with his arrow due to his lack of experience and the challenge of aiming at a moving target in the water. He is also dealing with the stress and anxiety of surviving in the wilderness, which affects his focus and precision. Additionally, the fish are quick and elusive, making it difficult for him to land a successful shot. This highlights his learning curve as he adapts to his environment and the skills needed for survival.