There are two interesting cases of blue fish in my home state. 1. The Beardslee Trout, which exists only in a single lake in the world: https://en.wikipedia.or

There are two interesting cases of blue fish in my home state. 1. The Beardslee Trout, which exists only in a single lake in the world: https://en.wikipedia.org/wiki/Beardslee_trout https://en.wikipedia.org/wiki/Beardslee_trout. Most photos online of these fish, including the Wikipedia thumbnail, are not representative of the stunning color of these fish in person, and are most likely not Beardslees at all. The lake itself looks like blue gatorade, and the fish have obviously adapted accordingly. 2. Lingcod, a fraction of which are a crazy alien blue color not only outside but throughout the flesh. https://oregonmarinereserves.com/2021/08/31/lingcod/ https://oregonmarinereserves.com/2021/08/31/lingcod/. This phenomenon applies to a handful of species, but lingcod is the most well-known.