I should have been more specific - there are 100 recognized species but:
"Presently, approximately 100 scientifically described species are recognized as valid, but genetic studies show that many species actually represent multiple closely related species. Additionally, many more undescribed
Apistogramma species have entered the hobby over the past 35 years. A large number of distinct populations (that we call “forms”) and color morphs also exist that may or may not be species in their own right. At the time of this writing we have recognized over 400 species, forms, and distinct population of
Apistogramma."