Ten sampling points are planned in the aquatic section of the Ferrande backwater. Sampling involves collecting aquatic fauna from flooded and floating vegetation. Shells will be sorted on-site and examined with a hand lens before being released. Less characteristic shells will be taken to the laboratory for examination under a binocular microscope, with deferred release on-site within the week. These samples will concern only a minority of the captured individuals.
Complementary litter deposit sampling on the banks of the Négria backwater may also help detect the species' presence. The presence of the Dwarf Ramshorn Snail is not yet confirmed on the site, but it is historically known in the vicinity.
The Regional Scientific Council for Natural Heritage (CSRPN) gave a favorable opinion on this request on September 26, 2026. The consultation is open from November 03 to November 18, 2026 inclusive.
