There are also "natural" paracrystalline viruses that turn isopods blue and then kill them. https://en.wikipedia.org/wiki/Invertebrate_iridescent_virus_31 http

There are also "natural" paracrystalline viruses that turn isopods blue and then kill them. https://en.wikipedia.org/wiki/Invertebrate_iridescent_virus_31 https://en.wikipedia.org/wiki/Invertebrate_iridescent_virus_...