Another example of the water-based wildlife from my d&d homebrew project. I really enjoy fleshing out these ideas visually!
Dragonfish are like the salmon of this setting, but bigger and fiercer. They swim upriver to spawn once a year, their scales and meat bringing a glut of business and activity to the small towns and one large city along the river. Despite the name, the only dragonlike thing about them is their appearance, with extra fins that fisherman thought resembled wings, and whiskery barbels that sense smaller creatures in the water to prey upon.