Blue lingcod: Though usually white-hued like halibut or cod, lingcod, a West Coast bottom-dwelling species, occasionally looks as though it's been marinated overnight in a tray of Blue No. 2 food dye.

Part of the fun of collecting is learning something extra about the history of the piece. This fish-shaped vase was sold at a Cowan auction in December 2015. It was described as “a hand-painted ...

He said the blue color disappears once the fish is cooked, so it looks and tastes like regular lingcod. The fish in his Facebook post was caught by Hedding's great-niece, Wisper Reynolds.