The Ultimate Aquarium has the largest selection of marine fish in the Central Valley. Owned by a marine biologist with 37 years of experience, The Ultimate Aquarium offers a wide selection of healthy fresh and saltwater fish, invertebrates, and rare, unusual fish--all in a friendly and fun environment.The Ultimate Aquarium is committed to sustainable, environmentally sound, fishing practices. We are vigilant in assuring that the quality fish we bring from around the world are collected without drugs and are propagated in captivity whenever possible.