* Oceans: The largest aquatic environments, covering over 70% of the Earth's surface.
* Seas: Smaller bodies of saltwater that are often partially enclosed by land.
* Rivers and streams: Bodies of freshwater that flow from higher to lower elevations.
* Lakes and ponds: Bodies of freshwater that are relatively still and often enclosed by land.
* Estuaries: Areas where freshwater rivers meet saltwater seas, creating a unique mix of salinity.
However, it's important to remember that not all fish live in all of these environments. Different species have adapted to specific environments based on their needs. For example, some fish live only in saltwater, while others live only in freshwater. Some fish prefer cold water, while others prefer warm water.