The Aequorea victoria, the oceans Medusa with a life saving secret. It has a fluorescent protein that revolutionised science. This discovery lead to huge advancements in the field of medicine making cells, diseases, such as cancer and HIV, visible. How cancer cells spread, how infections progress, imaging in every plant and animal, we can see only because of this ancient jelly and a protein it had for millions of years which helped it glow to save its own life: https://www.livescience.com/16752-gfp-protein-fluorescent-nih-nigms.html