Helminth parasites in aquatic environments can predict disease outbreaks in India. A specific parasite, Neascus vetestai, can be used as an indicator of water quality changes that may lead to infections in fish. By studying these bioindicators, researchers can take preventive measures to control diseases in fish populations, which are important for human consumption. This research focused on aquatic ecosystems in India, including rivers, freshwater, and marine environments, to understand the impact of parasites on fish health and public health.