yup. i discovered fluorescent rats myself a year or so ago.
apparently the peak absorption wavelength for Rattus is ~365nm (and it emits greenish blue, although our cameras seem to both have captured a deeper blue), and i wonder if that’s why they glow so brightly for me using a 365nm light?
that’s a nice shot showing the rainbow fluorescence that is apparently characteristic of opossums and shows the wide range of colors that tryptophan metabolites can fluoresce.