Mediterranean - France, Spain, Italy.
Locality: Upper photo: Cros de Cagnes beach, 27 metres, France, Mediterranean Sea, 3 April 2007, Sand and sediment. Length: 80 mm.
Lower photo: Cros de Cagnes beach, France, Mediterranean Sea, depth 7 metres, length 70 mm , 7 june 2007, sand and sediment. Photographer: Stephane Elliott.
Typical shape for the genus with an elongate flattened body with many longitudinal ridges on the mantle. There is a notch in the anterior midline of the mantle edge which forms a pouch for the two rhinophores which sit very close together in the dorsal midline. The rhinophores clubs consist of a series of vertical lamellae.
On the underside of the mantle skirt on each side is a series of secondary gills, similar to those in phyllidiids, running down each side to the posterior end of the body. There is also a band of lateral lamellae on the underside of the mantle at the anterior end. Both the genital openings and the anus are on the right side of the body at the anterior end, the genital openings being in front of the anus.
The mantle has a greyish black backgrouns colour and the ridges are white. The mantle is also edged in white anf the rhinophores are white. The oral veil and sides of the foot are translucent pink and the foot is alos edged with white. Little has been published on the biology of this species which grows to about 110 mm in length.
Pruvot-Fol, A. (1954) Mollusques Opisthobranches. Faune de France, Paris 58: 1-460, Pl.1.
Rudman, W.B., 2007 (June 30) Armina tigrina Rafinesque, 1814. [In] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/factsheet/armitigr