Glowsilk was a type of cloth made by the Bajorans. The silk was made from a creature that used to be very common, but were almost made extinct when the Cardassians ruined the islands where they lived during their Occupation of Bajor. Since the end of the Occupation, only a few farmers out on the islands raised them. These animals that spin the silk were totally domesticated and none were left in the wild. True glowsilk was biolumenescent and would glow in the dark.