Dice the raw salmon and tuna into cubes.
Cut the avocado in half and dice it.
Slice the cucumber and red onion.
Put rice in a bowl.
Top the rice with the prepared fish, avocado, cucumber, and red onion.
Mix soy sauce, sesame oil, lemon juice, and sugar to make the sauce.
Drizzle the sauce over everything.
Finish by topping with seaweed flakes, sesame seeds, and microgreens.