Immature mayflies are aquatic and are referred to as nymphs or naiads. Nymphs (naiads) are aquatic carnivores, feeding on insects, tadpoles, and small fish. Nymphs and naiads adorn the ceiling of the bathing room. Najas, the water-nymphs or naiads, is a genus of aquatic plants. They were compared to the Greek naiads, the nymphs of water elements. Picus was also described to be quite handsome, sought after by nymphs and naiads. Dragonfly naiads use jet propulsion, forcibly expelling water out of their rectal chamber. Rusalkas are the Slavic counterpart of the Greek sirens and naiads. For lists of Naiads, Oceanids, Dryades etc. They were also the fathers of the Naiads. This was reflected in holy springs/ water sanctuaries or in the worship of Naiads. He later conducted his "Naiads" overture. The naiads were also known to exhibit jealous tendencies. The Limnads are Naiads that lived in freshwater lakes. Naiads, again nude, swim around and clamber onto the boat.