Types of Fish: Edible, Freshwater, Saltwater & Aquarium

The main difference between aquarium fish and freshwater fish lies in their habitat and how they are cared for. Freshwater fish are species that naturally live in rivers, lakes, and ponds, where water temperature, pH levels, and flow change naturally over time. Aquarium fish, on the other hand, can be freshwater or saltwater species specifically chosen to live in a controlled tank environment at home or in an office, where conditions like filtered water, stable temperature, and artificial lighting are maintained. Not every freshwater fish is suitable for an aquarium, since some species require large open spaces, strong water currents, or specific dietary needs that are difficult to replicate in a tank. On the other hand, fish selected for aquariums are often popular due to their beauty, small size, peaceful nature, and ease of care — such as Guppies, Goldfish, and Betta fish. Understanding this difference is essential for anyone setting up a new aquarium, so they can choose the right fish and keep them healthy and thriving.