<p><em>Facelina auriculata</em> (O F Müller, 1776)</p>
Fairly frequent at LWS on rocky shores, but commonest below 15m. Feeds on Tubularia indivisa, (EML), Laomedea flexuosa and Obelia (EML). Simultaneous hermaphrodite. Spawn laid May to October as Grecian key line arranged in a spiral. Shelled veliger larvae drift as plankton before settling on the sea floor and transforming into adults.
- Oesophagus visible behind the rhinophores.
- Broad, foot wider than body. [3Fb]
- Cerata long, linear, rather untidy and lack iridescence. (Occasionally, a small amount of iridescence on the head, or very rarely all over cerata) [3Fb].
- No white pigment splashes down cerata, apart from small patch near top [2Fb]. (Occasionally a minute light spot or two on front of cerata.)
- Rhinophore lamellae all complete disks.
- Slender sickle-shape propodial tentacles [2Fb].
- Coral pink oesophagus visible behind the rhinophore .
- Usually iridescence on cerata and, sometimes, on head and body .
- Very faint sandy  to orange brown  lamellae on rhinophores.
- White pigment marks down front of cerata .
- Slender, foot no wider than body.
- Cerata usually neatly swept back, each group only slightly overlaps the next behind.
- Rhinophore lamellae alternate complete / incomplete disk.
- Propodial extensions shorter and stouter than on F. bostoniensis.