This is a vintage illustration of fantastical fish. The central figure is a large, flatfish with a golden-brown body. It has a distinctive head with a blue and red pattern around the eye, and a green, feather-like crest. The fish has a green, leafy tail and fins. Above it, there's a smaller, pink and blue fish, and to the right, another small, yellow and blue fish. The illustration is accompanied by handwritten French text, likely descriptions of the fish. The style is reminiscent of early natural history illustrations, with a focus on detailed, though somewhat fanciful, depictions of the creatures.