Cambodia imports about 5-6 tons of Salmon fish meats every week. Or about 20-25 tons every month. When Cambodian people think of Salmon fish meat, they quickly relate this to Japanese food, sushi. In Phnom Penh, a quick Google Search will tell you how popular the salmon sushi is with many restaurants offer the dish to the diners.
You may eat more than just the food that the farmed salmon fishes ate:
Like shrimp and tuna, salmon is very popular with Americans. Diners love it even as sushi. But in sushi’s birthplace, Japan, raw salmon wasn’t always on the menu. Jess Jiang of our Planet Money podcast has the story of salmon sushi’s rocky start.
TripAdvisor has this:
The 10 Best Seafood Restaurants in Phnom Penh (Seafood Restaurants in Phnom Penh) – TripAdvisor
8 best things about Salmon House | When in Phnom Penh
Fresh whole salmon at this local shop (that imports): $ 15.99/kg
And some more fresh salmon fishes available here at Deli Market near the Russian market
According to this Wikipedia entry, “Salmon is a popular food. Classified as an oily fish, salmon is considered to be healthy due to the fish’s high protein, high omega-3 fatty acids, and high vitamin D content.”