Let's get a little closer
This line that repeats makes me think that it is core. The title: "the beach", tells me that it is the means to develop the idea to pose: diversity. Symbology also gives us the traces, the fish: movement, freedom within the water. The crabs: recoil, if the flips can not be returned, they can not retreat. However, it can become a rich delicacy.
Then, the beach suggests a different meeting between themselves, although they seem opposite, it is the opposite. Good job, honey.