According to foreign media new atlas, in addition to the increasing challenge of albinism, many coral reefs in the world are being eaten by starfish. However, scientists have recently developed a simple new portable testing tool that can detect their presence more quickly than ever before. In the process of shedding old biological tissues, excreting wastes and performing other physical functions, aquatic organisms constantly shed their DNA into water. This genetic material in water is called environmental DNA – or Edna – and can be detected in water samples, even at very low concentrations. So by identifying the obvious Edna signals found in these samples, scientists can determine which organisms exist in a particular area. In recent years, the process has been used to track fish migrations, warn nearby great white sharks, and even search for Loch Ness monsters. < / P > < p > now, under the leadership of biochemist Jason Doyle, scientists at the Australian Institute of marine sciences have developed a field deployable kit for detecting Edna from starfish Echinococcus in seawater samples. The kit adopts the cheap sidestream detection technology currently used in the detection of family pregnancy. Its characteristic is that if there is target DNA, there will be a color band on it. < / P > < p > the kit is very sensitive and can react with Edna substances as small as 0.1 PG. This means that it can detect infestation when starfish are young, young, hidden by corals – at this point, they are likely not to be detected by divers who visually inspect the reef. < / P > < p > however, Doyle does not believe that this kit can replace divers. Instead, he thinks it can be used to mark certain areas of coral reefs, where divers can focus on finding and removing starfish before they cause much damage. < / P > < p > and this is not the first time we have heard of Edna analysis being used to help protect coral reefs. Last year, scientists from the University of Hawaii at Manoa described a way to monitor the abundance and species of coral on coral reefs by detecting DNA in water. Spontaneous combustion at a Guangzhou Motor vehicle intersection and other traffic lights in Shenzhen