Add butter to a hot skillet and allow to sizzle and melt down a bit.
On a plate, rub seasonings on both sides of tilapia.
Carefully add the tilapia to the pan and allow to brown on each side - 4 minutes or so per side.
Cook corn in microwave, according to package directions.
Check tilapia for flakiness before removing from pan. The fish should be very flaky when done.
In a small glass or serving cup, mix the salsa and the ranch. Chill until ready to serve.
Warm tortillas in microwave for a few seconds (with damp paper towels separating the tortillas) if desired.
On each tortillas, layer one crumbled or chopped tilapia filet, a small scoop of corn, and your desired amount of lettuce, tomato, and cheese.
Drizzle with the salsa ranch.
Use any remaining corn as a side dish for the tacos.