Invasive species pose a serious ecological and economic threat to various natural and manmade ecosystems, often remaining unrecognized until their effects become severe and irreversible. Conventional monitoring techniques such as frequent netting, trapping, visual surveys, and morphological identification are time-consuming, labour-intensive and costlier approaches. They are often inefficient in identifying species at low abundance or early developmental stages. Environmental DNA (eDNA)-based techniques offer a sensitive, noninvasive, and cost-effective alternative for the early detection and improved surveillance of invasive species. This technique detects species without direct observation or capture by collecting and analysing DNA that organisms release into their environments (such as water, soil or sediment). Environmental DNA combined with advanced molecular techniques like high-throughput sequencing and quantitative PCR enables precise species identification and real-time detection in challenging environments, combined with advanced molecular techniques like high-throughput sequencing and quantitative PCR. This article highlights using an eDNA-based approach for effectively monitoring and detecting invasive species at an earlier stage.