The Science Behind Coral Fluorescence: Understanding the “Wide-Band-Blue”

Fluorescent Proteins and the Ideal Spectrum for Vibrant Coral Colors Have you ever wondered why corals glow with such vibrant, otherworldly colors under aquarium lights? The secret lies in coral fluorescence, a fascinating process that involves special proteins that absorb and re-emit light in stunning hues. Whether you’re a hobbyist, coral breeder, or professional, understanding how this phenomenon works is key to maintaining vibrant, healthy corals in your system. Coral fluorescence is driven by proteins such as blue fluorescent proteins (BFPs), cyan fluorescent proteins (CFPs), green fluorescent proteins (GFPs), and red fluorescent proteins (RFPs). These proteins absorb specific light wavelengths and re-emit light at longer wavelengths, giving corals their striking colors. Each protein is excited by different wavelengths of light, which is why lighting plays a critical role in bringing out the full spectrum of coral fluorescence. For example, BFPs and CFPs require UV light in the range of 400–420…