Combine the coconut flour, egg, baking powder, 1 1/2 tsp kosher salt, and almond milk in a medium bowl. Whisk to remove any lumps.
Step 2
Slice the fish in half lengthwise and then cut each piece in half. Cut each half into smaller strips about ½” thick. Place 3 tablespoons of coconut flour and ½ tsp kosher salt on a plate and place the fish strips into the coconut flour mixture. Move them around to dust the outside of each strip with the flour.
Step 3
Heat a large nonstick skillet over medium-high heat until hot. Add enough avocado oil until there is ½” of oil in the pan. Allow it to heat for 30 more seconds. Dredge the fish strips in the batter and place the strips into the pan. Place the strips 1 ½” apart and allow them to fry for 2-3 minutes per side.
Step 4
Gently transfer the battered strips to a paper towel-lined plate using a spatula. Serve immediately!