By far the best-studied benthos are the macrobenthos, those forms larger than 1 mm (0.04 inch), which are dominated by polychaete worms, pelecypods, anthozoans, echinoderms, sponges, ascidians, and crustaceans.
Gargling with salt water several times a day is an effective treatment for chest congestion. While the salt helps remove mucus from the respiratory tract, the hot water reduces irritation in the throat. 1  Add 1 teaspoon of salt to a glass of warm water.  Mix well until the salt is dissolved thoroughly.
The most popular factor which triggers chest congestion is common cold. Also fungi, bacteria and allergens can also trigger chest congestion as well as infection. Some other medical conditions such as pneumonia, the flu, tuberculosis, bronchitis, asthma do contribute to the occurrence of chest congestion.