Scientific name: Ricordea florida
Taxonomy: Kingdom Animalia → Phylum Cnidaria → Class Anthozoa → Subclass Hexacorallia → Order Corallimorpharia → Family Ricordeidae → Genus Ricordea
Locations: Caribbean
Group: Marine Life → Invertebrates → Corallimorphs
These fluoresce. Even under natural light, it's obvious. At depth, the orange light from the sun has been filtered out by the seawater, so the only orange light is from fluorescence.