Sea Slug - Lobiger souverbii

Lobiger souverbii is a species of small sea snail or sea slug, a marine gastropod mollusk in the family Oxynoidae. They are small sacoglossid, found primarily on the green algae, Caulerpa.

It has retained an external shell which is semi-transparent. Like other sacoglossids it has rolled rhinophores. This species is characterized by its four long parapodial lobes, which often are seen rolled up like the rhinophores. These extensions of the mantle may become severed or autotomized when the animal is disturbed. This has led to some confusion, with several species (an in fact the original description of Lobiger souverbii) being described as having only two lobes. The body is green, making it difficult to find on its algal food source, with varying amounts of lighter speckling. The surface texture found on the foot and tail, also occurs on the lateral lobes and rhinophores.

They are very small in size, mostly less than 1 cm. This picture was made to show the beauty of this Sea Slug and does not show how well camouflaged they can be on the Caleurpa algae.