Bacteria and microalgae may also live in the interstices of bottom sediments.
The shoreline, and the bottom sediments that are the foundation of the food chain, appear to have been spared.
Preliminary testing indicates that there is some bacterial contamination of the bottom sediment.
This species probably uses its snout to probe for food in the bottom sediment.
They also sift through the bottom sediments using their tentacles.
But he said the greatest risk would come from a reviving of contaminants now trapped in bottom sediments.
Marine worms flourished in the bottom sediment of the sea that covered Illinois.
Most of these genera could probably either walk across the bottom sediment or swim weakly in the water column just above.
It burrows in bottom sediments, between 10 and 60 metres deep.
The research council also found that heavy traffic by workers trying to clean up the spill weakened the bottom sediment.