This presentation discusses the processing and characterization of bioplastics derived from the invasive seaweed *Rugolopteryx okamurae*. With 300 million tons of plastic discarded annually, bioplastics offer a sustainable alternative. The study examines the viscoelastic properties of various bioplastic compositions, including blends with commercial polycaprolactone, acylated soy protein isolate, and glycerol, showcasing their potential as eco-friendly materials to address plastic waste challenges.