Big salmon (I say that in a somewhat tongue-in-cheek way) seems to have a chokehold on all food suppliers. I swear salmon makes up 90% of the fish I see sold almost anywhere apart from a specialised fishmonger. I find it really wierd
This is such a narrow-minded view. The reason you think that is because you're from a country that lacks fish culture, where very few fish dishes are served. In Japan or Italy, they eat every single type of sea creature that could possibly exist and they eat them fresh and its a big part of their culture. In japan, there is sushi of every single sea creature that can possibly be eaten. Salmon is one option. So your view that salmon is the only good fish is completely cultural.
I'm from the UK and despite being an island we have no fish culture. We used to have more, but the supermarkets that have a total chokehold on our food lives have severely limited the variety (and freshness) of fish available, making us squeamish about foods that were an integral part of our culture (eels, cockles, smoked fishes of many kinds). This is a horrible horrible loss to the diversity of our diets and to the populations of the few fish people still eat (cod and salmon).
The lack of fish culture that makes you state such an opinion is most likely caused by unsustainable, monopolistic supply chains that have shaped culture, it is not an objective fact.
Luckily, I have carribean heritage and a degree in Japanese and so I have exposure to good fish from other cultures. You know, people make fun of the fact that the British used to eat eels, but in Japan, eel is seen as the most premium, most delicious food you could possibly eat? It's more expensive than steak to eat at a restaurant, it's so sought after. Salmon doesn't hold a candle to eel.
People in the replies sure seem to have a hard time accepting that markets aren't personal. It doesn't matter what you think tastes good. What matters is that buyers where this observation is being made think that salmon and trout taste good and that other fish do not. This is a very common situation in the US. You don't need to be offended by it or talk aggro-defensively about how your fish culture is superior to someone else's. The rise of salmon consumption isn't a conspiracy. It's just a flavor profile that agrees with the masses.
Did you read my reply. You are objectively wrong and I explained now. Your fish culture is caused by the industrialisation of food, which is what makes you think only salmon is good. Your point would only be valid if salmon was universally nicer to everyone. Like salmon is some inevitable singularity of fish consumption.
Have you tried fresh halibut? I don't like fish generally, including salmon, but actual Alaskan halibut (not flounder deliberately mislabeled as halibut) is quite tasty, to me.