Shred the imitation crab into bite-sized pieces.
Dice the cucumber and avocado.
Put rice into a bowl.
Place imitation crab, cucumber, avocado, and corn on top of the rice.
Mix mayonnaise, sriracha sauce, soy sauce, and sesame oil to make the sauce.
Drizzle the sauce over the poke.
Top with crushed seaweed and sesame seeds.