Under the Rock Lobster guide found HERE, I have found a mistake. Under additional notes the following is no longer needed. "You do not need to bring the Rune thrownaxe, which is needed to access Waterbirth Dungeon, if your door-opening partner has one. Instead, you may bring another Prayer Potion." There is no longer a need for a Rune thrownaxe to access the Waterbirth Dungeon. However there is a clan chat to make finding a door partner easier which is titled "burstinglobs" On the other hand, Rock Lobsters are no longer the best monster in Runescape for collecting charms. After an update in the charm drop rate, Waterfiends are now considered a better "charm dropper" than Rock Lobsters. Cheers, Misfortune.