Vision in fish

Fish see the world around them in a way that is different from how humans see. They have eyes, just like us, but their eyes are different shapes and sizes, depending on the type of fish.

Fish eyes are round and, unlike human eyes, they don't move around in their sockets. Fish eyes have a clear lens, which helps them focus on objects. They also have a retina at the back of their eye that has special cells called rods and cones. These cells help the fish see different colors and levels of light.

Fish are able to see different colors because their eyes have different types of cones. Humans have three types of cones, but some fish have up to twelve! This means that some fish are able to see colors that humans can't. For example, some fish can see ultraviolet light, which is a type of light that humans can't see.

Fish are also able to see things that are far away, because their eyes have a higher density of rods than humans. Rods are sensitive to changes in light levels and help the fish see in low-light conditions. This means that fish can see things clearly even in dark water.

In summary, fish see the world differently from humans because their eyes are shaped differently and have different types of cones and rods. Fish can see different colors and levels of light, which allow them to navigate their environment and find food.