An aquarist is responsible for the care and maintenance of aquatic animals and their habitats, typically in aquariums, marine parks, or research facilities. Their duties include feeding, monitoring water quality, cleaning tanks, and ensuring the health and well-being of fish, invertebrates, and other marine life. They may also assist in breeding programs, conservation efforts, and educating the public about aquatic ecosystems. Aquarists often work closely with veterinarians, marine biologists, and other specialists to maintain optimal living conditions for the animals. The job requires knowledge of marine biology, water chemistry, and animal behavior, along with hands-on experience.