Poisson Cru, which means 'raw fish' in French, is a traditional Tahitian salad. It is made with fresh raw fish, usually tuna or mahi-mahi, marinated in lime juice and coconut milk. The fish is mixed with diced vegetables like tomatoes, cucumbers, and onions, and seasoned with salt and pepper. Poisson Cru is a staple in Tahitian cuisine, known for its vibrant flavors and tropical ingredients.