saltwater fish Community tank at the Indianapolis Indiana Zoo Aquarium

collection of large fish, the indanapolis indiana zoo aquaruim
https://www.indianapoliszoo.com/memberships/membership-exclusives/?utm_campaign=Borshoff_Indy_Zoo&utm_source=Google_Ads&utm_medium=Performance_Max&utm_content=Membership&utm_term=Indy_Zoo&gad_source=1&gad_campaignid=22275497515&gclid=Cj0KCQjw_dbABhC5ARIsAAh2Z-QDwhOKTvz9cnHipwkYnmDexIaa1_qjUkSKf7gYY9lG3eEPYWlauBEaAvrsEALw_wcB
Saltwater fish, also called marine fish or sea fish, are fish that live in seawater. Saltwater fish can swim and live alone or in a large group called a school.[1]

Saltwater fish are very commonly kept in aquariums for entertainment. Many saltwater fish are also caught to be eaten,[2][3] or grown in aquaculture. However, many fish species have been overfished and are otherwise threatened by marine pollution or ecological changes caused by climate change.
Saltwater fish, also known as marine or sea fish, come in a variety of shapes, sizes, and colors. They can live alone or in large groups called schools. Some species are predatory, while others are reef safe. Some popular saltwater fish for aquariums include the ocellaris clownfish, which is easy to care for and find, and the Banggai cardinalfish, which is known for its resilience and elegance.
A marine aquarium is an aquarium that keeps marine plants and animals in a contained environment. Marine aquaria are further subdivided by hobbyists into fish only (FO), fish only with live rock (FOWLR), and reef aquaria. Fish only tanks often showcase large or aggressive marine fish species and generally rely on mechanical and chemical filtration. FOWLR and reef tanks use live rock, a material composed of coral skeletons harboring beneficial nitrogen waste metabolizing bacteria, as a means of more natural biological filtration.
Marine fishkeeping is different from its freshwater counterpart because of the fundamental differences in the constitution of saltwater and the resulting differences in the adaptation of its inhabitants. A stable marine aquarium requires more equipment than freshwater systems, and generally requires more stringent water quality monitoring.[1] The inhabitants of a marine aquarium are often difficult to acquire and are usually more expensive than freshwater aquarium inhabitants.