Slice the English cucumbers into 1/8-inch thick rounds and place them in a colander. Sprinkle with salt and allow to drain for 15-20 minutes.

In a large mixing bowl, combine the drained cucumber slices with diced crab and cubed avocado. Gently fold to combine.

In a separate bowl, whisk together mayonnaise, cream cheese, soy sauce, and sesame seeds until smooth.

Pour the dressing over the cucumber mixture and gently toss until everything is evenly coated.

Serve immediately or chill briefly in the refrigerator for 10 minutes before serving.