VIF (visible implant fluorescence) The labeling method is the use of different colors of material is injected into the animal body surface portion to distinguish between different individuals on the animal body damage is very small, and the long mark time. Main features: low cost tag, label long time (1--3 years) simple operation, no training no special monitoring instruments for biological damage, the impact of a small variety of colors, a variety of optional specifications optional semi-automatic marking system markable species: fish, amphibians, mollusks, mammals and other accessories: injection sleeve, blue lights, syringes, suitcases Note: different species choose a different color marker position to select a different range of applications based on biometric tables: distinguish individual or population, releasing mark breeding breeding, fishery resources survey to assess migratory habits of study, individual growth study