The Tennessee Aquarium is home to a richly diverse collection of the world's most fascinating aquatic species. Among the thousands of fish within River Journey, visitors meet prehistoric-looking arapaima and bizarre paddlefish. Along with nature's oddities are some beautiful darters, colorful cichlids, giant whiptail rays, enormous catfish and ghost-white gar. Sink beneath the saltwater waves within Ocean Journey to come face to face with big, toothy sharks, colorful reef fish, graceful rays and curious porcupine fish. Before or after exploring the naturalistic exhibits at the Aquarium, dive into this page to learn more about some of the Aquarium's most asked about fish species.