Burbot? Janne, you are a nut-case. Canada's Burbot is the inland equivalent of Pacific Halibut.
The baby blue eyes and slippery skin turn off all the ignorant & unwashed.
Pan-seared in a litle lemon butter. FAST and it has the texture of crab. SLOW is like roast chicken = very fine.
I know the fish, but did not know the english word for it.
I would not say it is much Halibut like, it being in the same family as Cod, I think it is more like a Cusk. Looks like one, even feels like one!
Have not fished for Butbot for 25+ years. I used to do night fishing specifically for him and Eel.
Now I target Cusk in my summer fishing. Cook the same way. Excellent in soup!
Turtle soup was imported to UK and Europe. Not European food. Exotic stuff.
There eas a short lived Turtle Soup cannery here in Cayman. Shortlivrd because UK, the main target country, did not eat much of it anymore.
( or maybe because it was of bad quality?)
I do not think the large sea turtles bred much on any European shore, historically or now?