When this organism senses food in its environment it moves by extending its pseudopodia and then it engulfs the food with the pseudopodia. the food enters the body and a food vacuole forms around it which contains certain enzymes to digest the food.

poor water quality affects most estuarine organisms, including commercially important fish and shellfish. the pollutants that have the greatest impact on the health of estuaries include toxic substances like chemicals and heavy metals, nutrient pollution (or eutrophication), and pathogens such as bacteria or viruses.

not sure if this is what you'r looking for eubacteria and archaebacteria