So does that mean there are 4 different types of cichlids?
yes, cichlids can be found in 4 parts of the world, However there are manyvarying species found in each location which can be very different in shape, size and overall temperament,
African (Old World)
Lake Malawi
-mbuna
-Peacocks
-haps
Lake Tanganyika
Lake Victoria
West African Cichlids such as Kribensis and Jewel Cichlids
Central and South American (New Worlds)
These can range from peaceful dwarfs such as apistos and rams, to medium sized semi aggressive species like Firemouths and Blue Acaras and then larger aggressive species like Jaguar and Texas Cichlids
Madagascan
Asian