A micro-crustacean has recently been discovered in Vendée. It is an Ostracod living in temporary bodies of slightly brackish or fresh water. From the Cyprididae family, Cypris bispinosa is a crustacean whose presence in France is only known from eight countess. It is however one of our largest ostracods, and the lateral spine fixed on each side of its carapace make the species easily recognisable with a lens.