Begin by slicing the English cucumbers into thin rounds, about 1/8-inch thick. Sprinkle lightly with salt and drain for 15-20 minutes.

In a large mixing bowl, combine the drained cucumber slices, crab, and cubed avocado, gently stirring to mix.

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 about 10 minutes before serving.