One of the most common species in the Mediterranean. These Worms have a very graceful, glistening appearance, after being rinsed from the dirt, which usually covers their bodies in large quantities, by repeated rinsing. However, the beautiful Hermione's thorns are more fearful than those of the Porcupine ( Hystrix), there barbs hold them back in the skin with which they come into contact. Predatory fish do not care much about these weapons.