The Mouse saw this at the market this past weekend.
The Mouse bought a package to try try for The Cat (price was reasonable compared to regular butterfish pieces).
Soaked a piece in water, changing the water twice. The Mouse thinks the time was not long enough. The fish was still too salty, like a salt lick. Fail. Sigh.
The Mouse still has four more pieces to experiment with. Longer soak time more water changes, maybe even a par boil. The Mouse will update.
Stay safe and well.
The Mouse