author(s)
Nizar Shawket, Youssef Elmadhi, Khadija El Kharrim and Driss Belghyti

abstract
Fishes play a complex and vital role as a source of protein and economic prosperity in developing countries which depend on traditional or commercial fishing. On the other hand, fishing is considered a source of income for most of the poor families which live in coastal areas. Although, there is a growing recognition that climate change leads to higher water temperatures and increased salinity, oxygen content, ocean acidification and impact on fishes in marine and freshwater ecosystems. These effects result in entering the non-native fish species to aquatic systems. Climate change also influences on native fishes by loss their habitats by their extreme competitive with non-native fishes which adapted with climate change. Moreover, transmission rates of parasites and pathogens between fishes are possible to rise with increasing salinity and temperature, which cause to the death of fish. However, the effect of climate change is continuing until the moment and more complex.