Nymphs

The Oceanids, for example, were sea nymphs; the Nereids inhabited both saltwater and freshwater; the Naiads presided over springs, rivers, and lakes. The Oreads were nymphs of mountains and grottoes; the Napaeae and the Alseids were nymphs of glens and groves; the Dryads or Hamadryads presided over forests and trees.
Source: https://www.britannica.com/topic/nymph-Greek-mythology