The site consists of five locations with typical Aruban wetlands known as saliñas, non-tidal coastal wetlands where sea water may sporadically mix with fresh water to form an environment of varying salinities. The saliñas support highly specialized species: the plants are typically salt-tolerant, with grasses and grass-like plants such as sea-purslane (Sesuvium portulacastrum) and whorled dropseed (Sporobolus pyramidatus) growing along the edges of the mud flats and salt tolerant shrubs and trees commonly bordering the saliñas. The marshes provide vital food and habitat for insects, crustaceans and reptiles such as the endemic Aruba whiptail (Cnemidophorus arubensis). The globally vulnerable Curaçaoan long-nosed bat (Leptonycteris curasoae) is also present. Many bird species are resident in the saliñas or use the Site as a migration stopover or a breeding spot. The Site plays an important role in flood control as it acts as a rainwater catchment which reduces the risk to surrounding areas. Pollution from urban wastewater, invasive species and tourism are current threats to its ecological character.