Yellow filter photos. Some love it. Some hate it. It provides a better representation of colors of certain corals we see under blue light that is typically not possible to photograph. At times it over exaggerates the fluorescent colors of LPS.
Coral fluorescence is determined by the glow (or scientifically called "expression") of green fluorescent like proteins (GFPs). Even though the name says Green Florescent Proteins, they come in various colors - from cyan to red & yellow.
Quick google research suggests that fluorescent proteins (FPs) are reported to play an important role