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You will get to access the place behind the door in the Mermaid Cove.
If you mean the one by the underwater cave you have to follow the squid on the first level of rescue the black puffle there is a squid follow it and you will come to a door which the key is hidden in.
b uy a blue puffle then touch the black thuing onn the door
you have to watch out for the ink. the ink comes from the squid. You will find a door then you go up to it. Next you will get a code for the door. Hope that helped.
The sign says "Follow the squid shadow but watch out for ink." Then u find a door and you go over it and get the black key pin.
What you have to do is you have to get a key from Gary and then go to the door and unlock it with the key! but choose wisely, or else you have to get another key from the drawer!!
be a member and go on black puffle rescue get the key and unlock the door /this may take a while/.
yes,you go through to the mining place and to the hidden lake then through the squid door.(if u have the mossy key pin)
Go to the Pufflerescue Desk and play the black puffle. When you get the puffle on Level 1 wait for the squid and follow his shadow in order to find the door and get the key. Them exit the game and go to the door and unlock it. P.S. Make sure you pass over the bubbles so you can breathe. But if you don't you get smaller and smaller until you go, POOF!
there isent one
Walk through the door
November 2012.