In a medium bowl, whisk together soy sauce, lime zest, and lime juice. Add ginger, garlic, cilantro, sesame oil, crushed red pepper, and salt. Slowly incorporate peanut oil, whisking until well combined.

Place shark steaks in a shallow dish and pour marinade over, ensuring each steak is well coated. Marinate in the refrigerator for 15 minutes.

After 15 minutes, flip shark steaks and marinate for another 15 minutes.

Prepare your grill; preheat gas grill to medium-high, or light charcoal and wait for ashed over.

Coat the grilling grates with peanut oil using a paper towel soaked in oil.

Pat dry each shark steak with paper towels before grilling.

Grill shark steaks for 5-6 minutes on each side until they reach an internal temperature of 145°F.

Remove from grill and serve immediately with grilled vegetables or a salad.