Mix shrimp with lime juice, lime zest, chili powder, and salt.
Preheat a cooking pan over medium-high heat and drizzle some oil. Once the pan is heated, add shrimp.
Sear shrimp until it turns pink and opaque on one side side, flip all shrimp and let them sear on the other side until opaque. Once shrimp are done, take them out of the pan right away.
Peel avocado, take out the pit, and dice the avocado meat. Dice cucumber, red onions, green onion, and tomatoes. Mince cilantro and set aside.
To assemble the tacos: layer guacamole, then seared shrimp, and then veggies in the taco shell.
Notes
Disclaimer: Nutrition information shown is not guaranteed to be 100% accurate as most ingredients and brands have a slight variation.