máy nạp đáy
/ˈbɒtəm fiːdə(r)//ˈbɑːtəm fiːdər/The term "bottom feeder" is a fisheries slang that refers to aquatic species that mainly feed on organic matter, detritus, and waste matter lying at the bottom of a water body. The term "bottom" in this context relates to the substrate or the sediment at the base of the body of water, while "feeder" refers to an animal that actively feeds. The origin of the term is traced back to the late 19th century, when fishermen used it to describe species that scavenged the ocean floor for food, such as catfish, carp, and grouper. The derogatory connotation associated with the term "bottom feeder" comes from the fact that these animals were once considered, and sometimes still are, less desirable to fish due to their dietary habits. However, in recent years, scientists have recognized the ecological importance of bottom feeders in maintaining the health of aquatic ecosystems by regulating nutrient cycling and preventing excessive accumulation of waste.
a person who earns money by taking advantage of bad things that happen to other people or by using things that other people throw away
một người kiếm tiền bằng cách lợi dụng những điều tồi tệ xảy ra với người khác hoặc bằng cách sử dụng những thứ mà người khác vứt đi
a fish that feeds at the bottom of a river, lake or the sea
một loài cá kiếm ăn ở đáy sông, hồ hoặc biển
