What are the three basic types of aquarium habitats?
The three basic types of aquarium habitats are live reef, saltwater fish-only and freshwater. Reef habitats are defined as an aquarium with live corals and invertebrates with compatible fish. You are limited to what types of fish can go into this habitat because most fish eat invertebrates as their staple. Saltwater fish-only aquariums are tanks that house only fish. These habitats allow you to mix a wide variety of fish together. Freshwater aquariums can be kept in a community environment or in a habitat specific to their physical region.