This research shows that oyster mushrooms (Pleurotus ostreatus) can effectively remove Remazol Brilliant Blue R dye from contaminated water. The mushroom pellets remove the dye through a combination of absorbing it on their surface and breaking it down with special enzymes called laccases and peroxidases. The study achieved 98.5% dye removal, suggesting this mushroom could be used to treat industrial wastewater from textile factories.