The Istanbul Aquarium is a large aquarium opened in 2011 and is one of the largest aquariums in Europe. The aquarium features over 15,000 different aquatic animals, including fish, reptiles, amphibians, and invertebrates. The aquarium's collection includes species from the Black Sea, the Mediterranean, and the Red Sea, as well as exotic species from around the world. The aquarium also has a large dolphinarium, where visitors can watch dolphins perform, and a number of interactive exhibits and activities. It is a popular destination for families and offers a fun and educational experience for visitors of all ages.