The Moon is all about illusion, mystery, dreams, intuition, and a little bit of danger. There is a spooky element here, so I thought it would be appropriate to discuss this around Halloween!
When The Moon falls in a reading, pay attention to what you might be avoiding. Sometimes it's an obvious thing that you simply don't want to confront, but if you continue in that vein, what was an inconvenient issue could blossom into a very big problem. You're probably ignoring something that you need to deal with.
The crayfish represents the deepest subconscious. When the tide is high, we don't see what's beneath the surface of the water, so we don't give it much thought. When the tide goes out, we have a glimpse at what lurks on the ocean floor. It is not to be ignored--it's as much a part of our world and our evolution as things we see clearly every day.
The moon is the symbol of madness (lunacy) and femininity, of our most basic animal urges. Think about the concept of the werewolf--it's mirrored here in the dog and the wolf in the foreground (the former is domesticated, the latter is wild). The moon's light is reflected, not direct, hence all the illusion. It brings our secret side to the surface: suppressed feelings, clandestine motives. You must acknowledge these things or they'll find a way to take over.
Purge those deep memories. Look beyond the illusion. Pay attention to your dreams and your subconscious instincts. Once you bring what's in the darkness into the light, you can move forward in a less altered state. Use your imagination, but don't confuse fantasy with reality. This is a very psychic card and, at times, shows that you have an uncanny and very deep attraction to another person...or vice-versa. To wade through the message of The Moon, trust your instincts and be completely honest with yourself.
For some more clues to the meaning of The Moon card, compare the version from the Rider-Waite deck above to The Moon from the Halloween Tarot to the right. (I admit I'm partial to this particular version with the French bulldog representing domestication in opposition to the werewolf. Cute!) Note all the arrows lending to the confusing, illusory aspects of the card. The crayfish makes an unexpected appearance, and the castle in the distance signifies finding your way through the chaos to a place of stability. Comparing the same card from different decks is a great way to expand your insight. Look closer--you might find more!