|Where||Towards the right in the Hidden Lake|
|Opened|| Cave Expedition|
March 15, 2010
This room was first opened as a members only room during the Cave Expedition. There was a free Coral Reef Background attached to a rock. The background is no longer there and has been replaced by the Moss Key Pin, which is available in exactly the same spot. The room reopened on March 15, 2010 and is only accessible to members. On January 19, 2012 the seahorse and the fish in the room were removed. In 2015, the room was made accessible to former members who collected the Moss Key Pin.
During the Cave Expedition.
- This is one of three member-only rooms that are always available.
- Club Penguin removed the fish, seahorse and the pin (now seen only when you haven't got it yet) to make the game load faster
- It is one of the most unused rooms next to the Boiler Room. This room is normally empty even on a full server.
Names in other languages