The LEGO Creator Fish Tank (31122) is a building toy set released in 2021 by LEGO. This set is part of the LEGO Creator theme, designed for children aged 8 and above. With a fish tank theme, the set allows kids to build their own aquatic environment with intricate details. The set includes all the necessary pieces to create a tank, such as various fish, coral, and accessories, providing hours of imaginative play for young builders.