Option 1: Crocodile. Crocodiles have a relatively large number of ribs, but not the maximum number compared to the other options.

Option 2: Snake. Snakes have the maximum number of ribs among the given creatures. Their ribs run along the entire length of their bodies, allowing for flexibility and enabling them to swallow prey larger than their own head.

Option 3: Ray fish. Ray fish have a skeleton made of cartilage instead of bones, meaning they don`t have ribs as such.

Option 4: Flying mammal, which likely refers to bats. Bats have a similar number of ribs to other mammals, which is less than the number found in snakes.

Therefore, the correct answer is option 2, as snakes have the maximum number of ribs among the given creatures.