Solitary Islands Marine Park spp"), as well as sacred kingfishers ("Todiramphus sanctus"), are regularly seen in the estuaries. Around 30 species of marine mammals have been recorded in the region, including the Short-beaked common dolphin ("Delphinus delphis") and bottlenose dolphin ("Tursiops truncates") who are residents throughout the year. Of particular interest in the Marine Park and Reserve are those species listed as threatened and subject to national and international conventions. These mammals include humpback whales ("Megaptera novaeangliae"), who are commonly encountered in the area as they migrate north to their breeding grounds in June and July, and then again between September and November when
Hydrus (legendary creature) Hydrus (legendary creature) The Hydrus (also known as "Enhydros, Enidros, Hildris, Hydra, Idra, Idres, Ydre, Ydris", and "Ydrus") is a creature from Medieval bestiaries. They were said to be found in the Nile River. While in the Nile, a crocodile would roll the hydrus in the mud before eating the smaller creature. However, once inside the crocodile's stomach, the hydrus would burst free from the stomach lining. In medieval Christian tradition, this bursting free from the crocodile became an emblem of the resurrection of Christ bursting free from Hell. There is considerable confusion in applying the name hydrus and its