Rainbow sea slug found in UK; Woman discovers extremely rare creature in Falmouth rock pool

Sea slugs are bright creatures found in water bodies. A photographer named Vicky Barlow shared an image of a rare rainbow-coloured sea slug on his Instagram handle @thehidephotogfraphy. "This is the Rainbow Sea Slug, only recorded in the U.K. for the first time in the last year, and only a handful of sightings since then!," Barlow wrote in the caption of the image. Sea slugs are said to be found in warm water bodies.