If we are talking about a big fish that has existed for more than 500 million years, then thoughts of an amazing shark immediately come to mind! This marine animal has long sharp teeth, excellent vision, which exceeds the acuity of a human 10 times, as well as an excellent sense of smell, thanks to which shark can feel the smells, wafting through the water and air. A beautiful shark lives in all seas, oceans, and in our blue neon cursor for a mouse!