Sea Star Wasting Disease (SSWD) refers to a suite of clinical signs observed in Asteroidea species, presents to varying degrees as abnormal posture, epidermal ulceration, arm autotomy, and eversion of viscera. We present observations of SSWD in the sunstar Crossaster papposus, the first observations of its kind in European waters. With rapid environmental flux as a proposed trigger for this condition, increasing frequency of temperature fluxes may lead to increasing prevalence of SSWD, and have wide reaching ecological and management implications.