Saltwater (Marine) Environments:
* Oceans: The vast majority of fish species live in the ocean, which includes different zones like the surface, the open ocean, coral reefs, and the deep sea.
* Seas: These are smaller bodies of saltwater connected to the ocean, like the Mediterranean Sea or the Baltic Sea.
* Estuaries: These are areas where freshwater rivers meet the ocean, creating a mix of salt and freshwater.
Freshwater Environments:
* Rivers and streams: Fish can be found in rivers and streams of all sizes, from small creeks to large rivers.
* Lakes and ponds: These are bodies of freshwater that are typically enclosed, offering diverse habitats for fish.
* Wetlands: Marshes, swamps, and bogs provide unique environments for fish with specific adaptations.
Other Environments:
* Underground rivers: Some fish species have evolved to live in caves and underground rivers.
* Aquariums: Humans have created artificial environments for fish in aquariums, both home and public.
Important Note: Different fish species have specific requirements for their environment, including water temperature, salinity, oxygen levels, and food availability. This explains why some fish can only be found in certain areas and not others.