Metriaclima greshakei
The scientific name of this species of fish is Metriaclima greshakei. Their common name is William’s Mbuna. This species was first described by Meyer and Foerster in1984. The genus name “Metriaclima” is derived from Greek, where “metri” means temperate and “clima” refers to a slope, which relates to the head shape of these fish. The species name “greshakei” is named after Dr. Ansgar Greshake.
Synonyms: Maylandia greshakei, Pseudotropheus greshakei.
Description
Metriaclima greshakei has a slender, streamlined body typical of cichlids. Males reach a length of about 14 centimeters, while females remain smaller, with an average length of 10 centimeters. The basic color of the male is a distinctive ice blue, with an orange-colored dorsal fin that transitions into a mottled pattern. The flanks may show 8 to 9 vertical bands depending on the mood of the fish . The caudal fin is also orange with light blue fin rays, while the anal fin is light blue with yellow egg spots. Females are predominantly brown with a blue sheen and also have an orange tint in their fins.
As for behavior, Metriaclima greshakei is a relatively aggressive species, especially towards male conspecifics. They are territorial and defend their territory, but are less aggressive than some other Metriaclima species. These fish live in schools and are not shy, which makes them suitable for a lively aquarium. In the wild they can reach a life expectancy of about 5 to 10 years, while in a well-maintained aquarium they may be able to live longer.
Biotope
Metriaclima greshakei is endemic to Lake Malawi, where they are found mainly in the rocky areas of the reefs, particularly around Makokola Reef and near BoadzuluIsland. This species lives in Lake Malawi and can be found at depths down to about 25 meters.
Their natural habitat consists of rocky substrates with little underwater vegetation, which allows them to hide and hunt. The bottom consists mainly of rocks and gravel. Natural predators are there, but Metriaclima greshakei is also a hunter that feeds on phytoplankton and other small organisms. They live in a tropical climate without seasonal floods or droughts.
Diet
In the wild, Metriaclima greshakei feeds mainly on plant materials present on rocks. In an aquarium, this species can be fed a diet consisting of vegetable flakes, cichlid flakes and other prepared foods. It is important to provide a significant portion of plant foods, as too many high-protein foods can lead to health problems such as bloat. Avoid feeding too much live food or high-protein foods, such as shrimp mixes, to avoid health problems.
The Aquarium
For keeping Metriaclima greshakei, an aquarium of at least 300 liters with a length of 150 cm is recommended. If you want to keep several pairs, the aquarium should be larger. The setup should consist of many hiding places and rock formations, as these fish like to hide. The use of a sand- or gravel substrate is ideal, as this mimics the natural environment.
The best water values for this species are a temperature between 22-26 °C, a pH of 7.5-8.5, and a hardness of 12-16 dGH. Metriaclima greshakei can be kept well with other Malawi cichlids, but should be avoided with highly aggressive species or fish that may threaten their territory.
Breeding Metriaclima greshakei
Breeding Metriaclima greshakei is quite easy. The male tries to lure a female into his territory. He spreads his fins wide and with trembling movements he shows his flank to show how beautiful he is. If the female is ready to mate, she goes with him to his territory. Circling around each other, the female lays eggs in the sand. The male fertilizes the eggs while circling, after which the female picks up the eggs in her mouth. The nests of the Metriaclima greshakei are not very large. Usually the female lays about 30 to 50 eggs. After mating, the female is chased away.
The female now looks for some quieter places in the aquarium between the rocks. She holds the eggs and fry for about 21 days. The eggs hatch after a few days, but it is not until about three weeks that the female releases the fry. During brooding the female (almost) does not eat. In a mixed aquarium, only a few fry will survive if they can find enough shelter between the rocks.
Raising an entire nest
The breeder who wants to keep more young Metriaclima greshakei usually has a second aquarium to which he moves the female where she can safely release the fry. Use a bare aquarium with only a filter, heater and some rocks as shelter for the female. Catch the female after the second week. The female will generally hold the young while capturing. If you catch her later than two weeks, she may already spit out the young fish in the net, she usually takes the fry back in her mouth if you give her some rest in the breeding aquarium.
After about 21 days, the female releases the fry. You don’t have to worry about the fry being eaten. The female will leave the young fish alone for the first few hours after releasing the fry. After releasing the fry, put the female back in the show tank.
As a grow-up food you can give different types of food such as breeding food, dust food, but also simply crushed flake food works fine.
Particularities
Metriaclima greshakei is a popular species among aquarists because of its attractive colors and relatively easy care. The species is also available in an albino form, offering an interesting variation for aquariums. These fish are also known for their social behavior and can live well with other cichlids, provided the right environment and space are provided.
Conclusion
Metriaclima greshakei is an excellent choice for both novice and experienced aquarium keepers. Their vibrant colors and interesting behavior make them an attractive species. Although they may show some aggression, they are relatively easy to care for and can thrive in a well-appointed aquarium. It is important to provide adequate hiding places and maintain proper water levels to ensure their well-being.
My experience keeping this species has been mostly positive. They are active and interesting to watch, and with proper care they can achieve longevity in an aquarium environment.
Video
Author
John de Lange
Copyright images
Kevin Tien
Stanisław Gajaszek
