The left and the right wheels can be rotated freely when the middle wheel is looking towards the right or the left wheel correspondingly (see the video) Rotation of the middle wheel always causes the rotation of both other wheels. For example if you want the middle wheel to come to the position of 4

The symbols you see while rotating the wheel can also be found on the wheels near the ray fish. Here is the combination of symbols and numbers which you need:

Listen to the “clicks” (see the video below).

Rotate the wheel to the left, as indicated by the buoy icon, AND look at the symbols that can be seen in the middle of the “octopus”

same buoy image can be found on the bottom of Nautilus Cluebox.

On the key taken from the previous step you will find a buoy image

The answer is: Symbol 2, 1 and 3 starting with the bar used in the example.  If you adjust everything correctly, you will be able to extract two keys, as shown: Pull the key up Pull the key out 3. Pull the key out

Find the symbol from under the propeller at one of the three moving bars. Then find the symbol you found in the octopus tentacle on this bar. This symbol determines the right position of the bar. Adjust all the tree bars according to this principle

Find the form on the “octopus” side of the Nautilus Cluebox and memorize the symbol inside of the form.

Similar forms and symbols appear on other elements of the box

Put the holes of the propeller so that you can see the same symbol through the holes. This will result in one of the forms becoming complete (in the circle)

Every symbol you find under the petals is illustrated twice.