Marinate the fish by combining lime juice, olive oil, salt, and pepper in a bowl. Add the fish and let it marinate for 20-30 minutes in the fridge.
Make the pico by chopping jalapeno, red onion, tomato, and cilantro. Mix together and add salt and lime juice to taste.
Make the crema by whisking together sour cream, lime juice, and salt.
Slice radishes and red cabbage thinly.
Cook the fish on a hot skillet until done.
Assemble the tacos by placing the fish on a tortilla, adding the pico, radishes, red cabbage, crema, and Cotija cheese.
Serve immediately and enjoy!
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