Tethys fimbria is a big nudibranch in the family Tethydidae. My specimen is from Croatia and photos were taken in the aquarium:
Tethys fimbria have cerata on sides of its body. Dorsal view from its tail end:
Self-amputated cerata of Tethys fimbria:
Frontal view of Tethys fimbria:
Its rhinophores are small. The left rhinohore is that small brown thing:
It is known, that species in the family Tethydidae are predators. They hunt small crustaceans. But I have never read which exact small crustaceans they eat. They use the oral velum or oral hood for catching the prey.