The cave systems of the Neretva River basin in the Dinaric Karst are home to Congeria kusceri. one of the very few known examples of stygobiotic bivalve mollusks. which displays several unique life history traits and adaptations that allowed its adaptation to the subterranean environment. This endemic species is undergoing rapid decline. https://fitnessgravesyardes.shop/product-category/hr-kit-polar/