Goldfish can see more colours than humans. Humans have three types of colour-sensing cells in our eyes (red, blue and green). Goldfish have a fourth type of colour receptor that allows them to also perceive ultraviolet light, thus making them tetrachromats.
Most fish—including the humble goldfish—have a special organ called the lateral line on each side of their bodies. This gives fish a sense humans don’t have. The lateral line is a series of pits. These pits sense subtle changes in water movement and pressure, creating a sense that’s almost like hearing, touch, balance and sonar rolled into one. Some fish, like sharks and electric eels, take this further, and can sense electrical fields with this organ. While your goldfish doesn’t take this little superpower that far, a goldfish can use this sense to detect disturbances in the water, like prey foods or fish flakes splashing against the water’s surface.
Picture Credit : Google
