The goldfish, 1925, Oil and watercolor on paper, mounte Paul Klee (1879-1940)

The picture has something of this: fish, underwater, water, aquarium, ocean, sea, swimming, reef, nature, invertebrate, coral, marine, goldfish, environment, wildlife, diving.
Perhaps it’s a painting of a yellow fish surrounded by other colorful fish in a dark blue, green, red, and black sea with blue, corals, and seaweed, and corals.