in its native range in the southern hemisphere, "corella eumyota" can grow to a length of about and is grey or ivory in colour. the tunics of large individuals are thin, transparent and papery, while smaller individuals, which are a great deal more abundant, are thicker and gelatinous. this species has been introduced into the northern hemisphere and here it is described as being long, semitransparent and white, brown, or orangeish, the siphons often being orange.