Hello Singapore_Teen_Cook. It is wonderful that you are eager to expand your culinary horizons and prepare a warm meal for your family, but I must strongly urge you to reconsider cooking and eating this fresh moray eel. While moray eel is consumed in a few specific regional cuisines around the world, wild reef moray eels carry an extraordinarily high risk of causing severe ciguatera fish poisoning. As a chef who values ingredient safety above all else, my unambiguous advice is to avoid eating it altogether.
The most critical fact to understand about ciguatera is that no culinary preparation method can make a toxic fish safe. Ciguatoxins are produced by microscopic marine algae found on coral reefs and bioaccumulate as they move up the food chain, reaching concentrated, dangerous levels in apex reef predators like moray eels. Unlike bacterial contamination, ciguatoxin is completely heat-stable. Boiling, steaming, deep-frying, baking, freezing, or marinating in citrus or vinegar will not breakdown or neutralize the toxin in any way. Contaminated meat also retains a completely normal appearance, smell, and taste, meaning there is no way to detect it at home.
Moray eels also present secondary hazards, such as toxic proteins in their blood called ichthyotoxins. While thorough cooking over 75 degrees Celsius does denature these blood toxins, heat has zero effect on ciguatoxins. The organ tissue and liver harbor the highest toxicity, making handling and gutting hazardous as well. Ciguatera poisoning can cause long-lasting neurological problems, gastrointestinal distress, and temperature sensitivity that can persist for months, making the risk far too severe for a family meal.
If you would like to make a rich, belly-warming homestyle dish, I strongly recommend replacing the moray eel with commercially farmed freshwater eel or a safe, store-bought white fish. Farmed eel does not carry ciguatera risks and pairs wonderfully with ginger, garlic, soy sauce, and sesame oil in a slow braise or soup. Prioritizing your family's health is always the hallmark of a great cook, so please dispose of the wild moray eel safely and choose a reliable alternative instead.