Micro and nanoplastics are emergent pollutants of the modern world. Since the finding of new synthetic polymers and making into different usable products, its durability has made it so attractive that it is being used in many consumer products. The weathering of plastics leads to microplastics and then to nanoplastics. Moreover these particles acts as a vector for other pollutants, by carrying other xenobotics like heavy metals and pesticides, at the same time these particles haing other addtives inherently like bisphenol, phthalates and other organics will also get leached during weathering process. From house hold drains to treatment plants and finally to aquatic system, ultimately reaching organisms dwelling there. Rotifers forms one ofthe basic component in the aquatic food chain. Nanoplastics of two different sizes 50 and 100nm polystyrene spherules were treated to Philodina roseola a fresh water rotifer. The LC50 for 100 and 50 nm polystyrene spherules were 22.94 ppm and 16.36 ppm respectively. Rotifers caused diapauses and failed to produce F2 generation. The biochemicals and antioxidant assays decreased when the concentration of nanoplastics increased. Eggs treated with nanoplastics showed 89 % mortality at 72 hrs with LC50 of 14.72 ppm, no hatching was observed upto 180 minutes, all the eggs went into diapause. After 180 minutes neonates developed leading to F1 generatio. The proportion of neonates transforming into aduls was least.. Finally the adults could not gave raise to F2 generation. Nanoplastics has an impact on to fresh water rotifers