Drak

The Drak are a kind of bug that lives in the cold space, but in order to reproduce they need a warm place. In the Farscape episode "Exodus from Genesis" the Drak queen, Monarch uses Moya as it's warm nest. While on Moya the Draks collect DNA samples from the crew, in order to produce replicants of the crew, that the Monarch, can command to defend the nest from any threats.