There is an old record (1800's) of bioluminescence by an endolithic bivalve, but I do not recall whether this has been verified.

In addition to the more normal approach of body bioluminescence (due in at least some cases to symbiotic bacteria), I believe at least one deepsea cephalopod has bioluminescent ink, presumably confusing to predators.

Fluorescent patterns are quite common.  Often fossils will still show a color pattern under UV light despite looking plain white or brown in ordinary light.

    Dr. David Campbell
    Old Seashells
    University of Alabama
    Biodiversity & Systematics
    Dept. Biological Sciences
    Box 870345
    Tuscaloosa, AL  35487-0345 USA
    [log in to unmask]

That is Uncle Joe, taken in the masonic regalia of a Grand Exalted Periwinkle of the Mystic Order of Whelks-P.G. Wodehouse, Romance at Droitgate Spa