Sharks are capable of thinking and making decisions, especially when it comes to feeding. Sharks have complex brains and are able to learn and adapt to their environment. They are able to exhibit problem-solving behavior in certain situations and are able to learn from their experiences. Basically sharks are able to distinguish between different types of prey and choose the prey that they prefer based on their size and availability. This requires the ability to observe and process information about their environment, as well as the ability to make decisions based on that information.