cool-critters:

Tethys fimbria

Tethys fimbria is a species of predatory sea slug, a nudibranch, a marine gastropod mollusk in the family Tethydidae.
The distribution of Tethys fimbria includes the Mediterranean Sea and the east coast of the Atlantic Ocean from Portugal in the north, to the Gulf of Guinea in the south. The length of the body of Tethys fimbria can reach up to 30 cm. Tethys fimbria is translucent, but it has dark spots on its cerata. It has a broad oral hood in the frontal part of its body. The habitat of Tethys fimbria is seas which have sand or mud on the bottom, in depths from 20 to 150 m.
Tethys fimbria captures and feeds on small crustaceans. It uses its broad hood for catching them.

photo credits:
Pino Bucca,
prilfish