Saltwater fish

Saltwater fish are fish that spend some or all of their lives in salt water such as oceans or salt lakes, generally with a salinity of more than 0.05%.

Categorisation of saltwater fish by habitats

• Coastal fish (also offshore fish or neritic fish) inhabit the sea between the shoreline and the edge of the continental shelf
• Deep sea fish live below the photic zone of the ocean, i.e. where not enough light penetrates for photosynthesis to occur
• Pelagic fish live near the surface of the sea or a lake
• Demersal fish live on or near the bottom of the sea or a lake
• Coral reef fish are associated with a coral reef.