I have seen these names;
Black diamond cichlid (Paratilapia Polleni)
Marakeli cichlid (Paratilapia Polleni)
Paratilapia polleni (bleekeri) "Large Spot Cichlid"
Paratilapia polleni (bleekeri) "Small Spot Cichlid"
this is the specifics from the Large Spot
Madagascar is home to several species of unique and beautiful cichlids, many of which are rare or endangered due to habitat destruction and non-native species introduction.
"Paratilapia bleekeri" was once thought to be a regional color variant of or possibly a separate species than P. polleni, the Small Spot Cichlid. It is often confused with P. polleni, which has much smaller spots, and does not grow to be as large as the Large Spot Cichlid. Coloration is very similar, but "Paratilapia bleekeri" is black with larger pale blue and yellow spots all over. Although these two fish are very closely related, they should not be mixed. "Paratilapia bleekeri" is thought to be extinct in the wild.
This fish is somewhat aggressive, particularly with other Paratilapia sp. cichlids. Tank decor can consist of driftwood, rocks, plants, and a soft substrate. Feed them a variety of foods, basic flake or pellet and occasional frozen meaty foods. This fish is a cave spawner.
and this for the Small Spot info
Paratilapia polleni, the Small-spot Madagascar Cichlid, is a rare offering as it is endangered in the wild. These cichlids are dark with irregularly shaped white spots. They are often confused with the Large Spot Cichlid, once thought to be a regional variant or seperate species known as Paratilapia bleekeri, the Large Spot Cichlid. The Large Spot Cichlid is thought to be extinct in the wild and these two variants should not be kept together to avoid hybridizataion.
They are popular with aquarists due to their outgoing personalities and bold nature, much like oscars. They will need a meaty diet and plenty of cover like rocks and wood, while still maintaining free space in the aquarium for adults to swim freely.
