Slice the cucumbers into thin rounds using a mandoline. Sprinkle with salt and let sit for 10 minutes, then pat dry.

Chop or shred the imitation crab into bite-sized pieces and set aside.

In a large container, layer cucumber slices, imitation crab, diced avocado, mayonnaise, cream cheese, soy sauce, rice vinegar, and sriracha.

Seal the container and shake vigorously for 15 to 30 seconds to combine all ingredients.

Transfer the mixture to a serving bowl and garnish with toasted sesame seeds and shredded nori if desired.