McElligot's Pool is a children's book by Dr. Seuss, originally published in 1947. The story follows a young boy named Marco who is fishing in a small, seemingly insignificant pond called McElligot's Pool. When a farmer questions Marco's choice of fishing spot, Marco imagines a wide variety of fantastical fish that could be swimming in the pond, from thin fish to stout fish, and even creatures like two-headed twisting eels and kangaroo fish. Despite the farmer's skepticism, Marco remains optimistic and imaginative, believing that the pond might be connected to an underground stream that leads to the sea, allowing all sorts of fish to swim up and be caught there. The book celebrates the power of imagination and the value of not giving up on dreams. Dr. Seuss's signature rhymes and whimsical illustrations bring Marco's imaginative journey to life, encouraging readers to embrace their creativity and think beyond the ordinary.