Terebellidae
Terebellidae is a family of marine polychaete worms, commonly known as terebellids. They are a diverse group with over 600 species distributed worldwide in various marine habitats. Terebellids are characterized by their distinctive body forms and feeding habits, making them important members of marine ecosystems.
Characteristics
Terebellids exhibit a wide range of body sizes and shapes, but they generally share some common features. Their bodies are typically elongated and segmented, with a prominent prostomium (head) bearing sensory tentacles and a well-developed peristomium (first body segment) containing the mouth. They have a pair of long, fleshy palps that extend from the mouth and function in feeding. Many species have a series of long, stiff bristles (setae) on their bodies, particularly along the ventral surface, which aid in locomotion and burrowing.
Feeding
Terebellids are deposit feeders, meaning they consume organic matter found in the sediment. They use their palps to collect detritus, algae, and other small organisms from the surrounding environment. The palps are then brought to the mouth, where the food is ingested. Some terebellids have specialized feeding appendages, such as tentacles or branchiae, which increase their efficiency in collecting food.
Habitats
Terebellids inhabit a variety of marine habitats, including:
- Shallow coastal waters
- Deep-sea trenches
- Estuaries
- Coral reefs
They are often found burrowed in sediment, where they create tubes or tunnels for protection and shelter. Some species are free-living, while others are commensal or parasitic on other organisms.
Ecological Importance
Terebellids play an important role in marine ecosystems by consuming organic matter and recycling nutrients. Their feeding activities contribute to the health and productivity of benthic communities. They also serve as prey for larger marine animals, such as fish and crustaceans.
References
For further information about terebellids, refer to the following websites: