I recommend trying to eat more oysters and farmable shellfish.
They actually clean the water and have a positive impact on the ocean! Farming them is good!
This just reminds me of Louisiana oyster farmers in the US fighting against coastal restoration[1]. Part of me is convinced they are happier having more of our state erode away which will create more oyster farm beds.
[1]https://www.reuters.com/legal/government/louisiana-oyster-in...
But oysters are really not good. It tastes weird with too strong a note of salty water and has a pretty bad texture that makes masticating unenjoyable. They are poor man's food that got super expensive with clever marketing and supply management (and since they need to be alive the supply chain is extremely complicated and expensive, you can't store them for long).
If you live near a sea and can get them dirt cheap why not, but if you live far into the land, they are mostly a waste of good money and a way for pretentious people to appear fancy/rich at the Christmas holiday.