Most cichlids are freshwater fish. Many Africans tend to be confused with saltwater because they live in lakes with very high pH and hardness - meaning there's a lot of minerals in the water.
Obviously there are marine fish that live in the sea that are saltwater but this doesn't include cichlids. Many livebearers benefit from added salt and mollies can be full marine. However, again, this doesn't apply to cichlids. None the less, cichlids CAN benefit from a little bit of added salt - just like any other non-scaless freshwater fish might. But this is as a treatment for disease or as a preventative measure - not because they require salt.
The yellow lab in your avatar wouldn't require salt.
An exception would be the orange chromide which is a brackish cichlid.