Fjordia lineata is a species of sea slug, an aeolid nudibranch, a marine heterobranch mollusc in the family Flabellinidae.[1]
Fjordia lineata are commonly 20-30mm (2-3 cm) in length and are seen in a variety of colours, translucent white with either red, red-brown, yellow, or orange colouring of the digestive gland within the cerata.[2]
This species feeds on hydroids such as Tubularia indivisa.[3]
Fjordia lineata can be found throughout the British Isles, and can also be found south as far as the Mediterranean Sea and north to Norway.