Start with the yellow and blue fish that swim happily on the bottom left corner at the back of the Card. What can we do with these colours? Think in paint. Yellow+Blue=Green. Green fish can be found swimming through the waters on the front of the card!
If you read the letters on all the green fish from left to right, top to bottom you should be able to read five coherent words. Granted, some fish do stick out a bit of their base line – but that’s just the way of the sea. The words you should find are the following: ‘THE LANGUAGE OF THE SEA’.
Look for ‘the language of the sea’. This is more of a visual out-of-the-box Card, so it won’t be a radio language. The Navy sometimes uses this alphabet over long distances (but still in telescope range). This card uses the flag semaphore alphabet (the one with the yellow/red flags). Should you be in doubt as to the fire/light/arm/flag semaphore is used, try to find these elements on the Card. There is no fire, there are no specific directed light beams, and no arms either. Therefore the flag-version of the semaphore alphabet is used (you’ll find the flags later on). Keep this in mind, and take a fresh look at the entire Card.
The letter square should provide you with the guidance you seek to decipher some Semaphore. If you hold the card up to the light, you should see the weird-shaped seaweed shine through. It will indicate the letters P, U, R, P, L and E in the letter square. Now we know that Purple gives guidance.
In the flag semaphore language, you use the body of the person that is holding the flags as an anchor point (pun intended). Based on the position of the flags compared to the person holding them, we decide what is up/down/middle. We do not have those persons on this card however, so we should be looking for another element for guidance/a reference point. The purple fish make for a good candidate, as they swim in a straight line. The clue we found in the previous step (that purple gives guidance) confirms this theory. You can use the purple fish as your human bodies in this use of the flag semaphore alphabet.
Around every row of purple fish swim two red fish with yellow fins. These are your flags. If you see the top purple fish as the head of the person holding the flags, the middle one as the waist and the bottom one as the feet, they give you a decent anchor point (=guidance). Translating these combinations with the semaphore alphabet should give you the letters C, L, O, U and D. Together, they form the solution word of this card: ‘CLOUD’.