Order
Common name: Peanut Worms
Scientific name: Sipunculiformes
Sipunculiformes, commonly known as peanut worms, are a group of unsegmented, marine worms with a retractable introvert. They are benthic creatures, often found in burrows or crevices. Peanut worms are not common in the reef aquarium trade, but they can be beneficial detritivores, consuming organic waste and aerating the substrate. They are generally harmless to other tank inhabitants and can be interesting to observe due to their unique feeding and burrowing behaviors.