Scotland's first 'enclosed' salmon farm to open on Loch Long

It's a loch [1], i.e. a lake so no.

[1]: https://en.m.wikipedia.org/wiki/Loch_Long

As a vegetarian 900 miles from the nearest ocean coast, what's the advantage of wild caught vs. farmed when it comes to fish?

I don't think you could start any sort of restaurant on the dining concept of only serving hunted meat. Too gamey.

I assume they ban the use of open net and not something like this which reduces the harms of the open net style. concentrating the excrement on the bottom of the floor being a big one and polluting the sea with lice treatments being another one.

Are you applying American practices to a European context?

I’m not an expert so maybe someone else can chime in if I’m wrong, but: farmed salmon is not dyed pink. Their feed is supplemented with carotenoids like astaxanthin. These are substances they get in their diet naturally in the wild, is necessary for their health, and is also responsible for the pink color. This is the same class of chemicals which gives flamingos their distinctive pink colors. Flamingos, like wild salmon, eat algae and small crustaceans, both of which contain a lot of carotenoids.

Eating a lot of carotenoids can give humans (especially light skinned ones) carotenosis, which is a distinct orange or yellow tint of the skin. You have to eat quite a bit to get it though.

I greatly prefer the texture of Atlantic salmon to Pacific varieties like sockeye though.