Bioluminescence is a living organisms’ ability to emit light without heat production. Among the glowing species, up to 80% live in water. In search for alternative sources of energy and reducing heat emission, the Holy Grail of energy turns out to lie in the oceans. The discovery by researchers of the protein GFP (green fluorescent protein) found in jellyfish (spec. Aeuquorea Victoria) began a revolution in molecular biology and opened the way for futuristic projects, such as the genetic modification of trees to illuminate our cities. So far,GFP is used in genetics and medicine where it serves as a marker.