Tellurian leeches

Tellurian Leeches 

Quite common on Tellurus, these leechees feed on dead/decaying organic matter. Utterly harmess, they use their glowing spots and eyes (females with just eyes) to surprise and ward away predators. Their whole body is covered in microscopic cilia which allow them to grip to virtually any surface they slither across. Males use their glowing spots to attract females during mating season in the form of a dazzling display of colors. The greater range of color that a male displays is the determing factor of a good mate.

Their resilience are said to be comparable to cockroaches and they've been found, through research, to have medicinal properties, such that they can clean out infected wounds. They also happen to be excellent exfoliators.