Pat tilapia dry, season with salt and pepper, heat oil in a skillet over medium-high heat, then fry fillets 3 minutes per side until golden and flaky.
Shred cabbage, toss with juice of 1 lime and a pinch of salt to make slaw.
Blend sour cream with chipotle peppers and 1 lime's juice to make crema, then season with salt.
Warm tortillas, fill with tilapia, top with slaw and chipotle crema, and serve.