One species, one answer, at a fraction of the cost of a full biodiversity survey. Choose the target — northern snakehead, zebra mussel, quagga mussel, starry stonewort, hydrilla, round goby — and the assay reports presence or non-detection from a water sample.

Molecular detection finds an invader at densities far below what netting, angling, or visual survey will pick up. By the time a species is common enough to be noticed by chance, eradication is usually off the table. This is the test that runs before that point.