The same fountain from F.R.I.E.N.D.S intro is featured in this episode.
The Bunyip entry in The Book of Shadows reads, "A monstrous creature from Aboriginal land. The Bunyip lives in swamps, lakes, and rivers of the Australian Outback. It is believed to bring disease and is roughly the size of a cow. Usually the Bunyip leaves humans alone but when their source of food is disturbed they take humans under the water to their death in revenge".
The charecter Tull is teaching himself to play the pan flute in order to lure the nymphs. Ian Anderson plated the flute in the band Jethro Tull.