Dice the salmon into bite-sized cubes, removing skin and any pin bones
Whisk together soy sauce, rice wine vinegar, sesame oil, and sriracha, then pour over salmon and marinate for 15 minutes. Reserve a few spoonfuls for drizzling.
Slice the avocado just before serving to keep it from browning
Spoon warm brown rice into the bottom of each bowl
Layer the sliced avocado over the rice and scoop in the seaweed salad
Top with the marinated salmon, then drizzle with the reserved marinade and scatter with sesame seeds