Capitella

Capitella is a genus of segmented marine worms belonging to the family Capitellidae. These polychaete worms are commonly found in various marine environments, often in soft sediments like mud and sand. They are known for their ability to thrive in areas with low oxygen levels and high organic matter, making them indicators of polluted or disturbed benthic habitats.

The typical Capitella species has an elongated, segmented body. Their morphology often includes a prostomium at the anterior end, followed by a thorax and an abdomen. The thoracic segments are usually characterized by a specific arrangement of chaetae, which are bristles used for locomotion and burrowing. The abdominal segments are generally shorter and may have different chaetae.

Capitella play a role in benthic ecosystems by processing organic detritus and contributing to nutrient cycling. Their presence and abundance are often studied by marine ecologists to assess the health of seafloor environments. Some species within the genus are also of interest due to their potential use in bioremediation efforts. Their adaptability allows them to colonize a wide range of substrates, and they are found globally in temperate and tropical waters.