If you were raised in places like China, South American Amazon, or parts of Europe; chances are you've never tasted ocean fish before. There are places in China for example: were people have only eaten carp or catfish, etc., likewise there are places like Mexico for example: if you live close to the Sea of Cortez (greatest fishing paradise on earth), chances are you've never tasted freshwater fish like catfish or tilapia.

If someone from an inner region of China say for example, comes to the USA and tastes swordfish or halibut; they may not care much for the taste of ocean fish. The reason for this is, they are use to the taste of freshwater fish, so the taste of ocean fish won't quite do it for them...likewise; someone who has only eaten ocean fish all of their life may not care much for the taste of freshwater fish.

One of the ways to overcome this is by eating in good Chinese restaurants. Chinese people seem to know how to prepare both freshwater and ocean fish very well. Schezuan, Mandarin, and other culture/communities in China, know how to prepare both freshwater and ocean fish. Chinese spices and sauces seem to compliment all types of fish really well. Whether it's tilapia, whitefish, or swordfish; Chinese people do a really good job in getting the best taste out of all of them.