Oligochaete worms

Oligochaete Annelida spp.Annelida performing a reproductive form 'paratomical fission' where a new head is formed in the middle of the organism and then break away from the parent worm leaving it with a new tail and the other Annelida will swim away.

Oligochaete Chaetochaster diastrophus
Commonly found in ponds and aquariums. The ones in the photos belong to the fresh water habitats. They are harmless. Fish will readily eat them. They can grow to about 4 mm. Their bodies are very transparent which exposes their well developed digestive and nervous system.

Photos by Dusko Bojic