Cyprichromis

Genus Overview: Cyprichromis (Sardine Cichlids)

The genus Cyprichromis comprises an exceptionally popular, highly dynamic, and evolutionary brilliant group of open-water cichlids endemic to Lake Tanganyika. Grouped into their own unique tribe (Cyprichromini), these sleek, colourful fish break the typical bottom-dwelling or rock-hugging cichlid stereotype, operating as the primary pelagic schooling force across the lake's open water columns.

Pelagic Shoaling Mechanics & Tube Jaws

The name Cyprichromis translates from Greek to mean "carp-like cichlid," a reference to their sleek, non-cichlid-like vertical profiles. They are obligate zooplanktonivores, feeding primarily on microscopic copepods, small crustaceans, and floating insect larvae drifting in the lake currents.

To capture these micro-organisms, they have evolved highly protractile jaws that telescope forward into a clear, circular suction tube. When a shoal approaches a plankton cloud, thousands of fish rapidly pop their mouths forward, generating localized internal vacuums that cleanly snap up prey with extreme speed.

In the wild, they form breathtaking pelagic shoals numbering in the tens of thousands. These massive schools hover just outside steep, vertical rock drop-offs, moving together in absolute harmony to confuse larger open-water predators like Bathybates.

Valid Species Directory

Modern scientific records recognize roughly six valid species within this prolific lineage, though geographic colour variations add immense diversity to the hobby:

• Cyprichromis coloratus Takahashi & Hori, 2006
• Cyprichromis leptosoma (Bleeker, 1898) – The classic Slender Sardine Cichlid. The absolute cornerstone type species of the genus, famous for geographic variants like "Utinta," "Kigoma," and "Mpulungu." Males are highly polymorphic, displaying flashing neon blue heads with tails that pop in either bright yellow or neon blue.
• Cyprichromis microlepidotus (Poll, 1956) – The fine-scaled sardine cichlid, reaching slightly larger adult dimensions and showcasing intense multi-color pastel reflections. Famous variants include "Kasai" and "Kiriza."
• Cyprichromis pavo Poll, 1986 – The Peacock Cyprichromis, prized for its deep vertical body profile and ornate tail fins.
• Cyprichromis zonatus Takahashi, Hori & Nakaya, 2002 – Characterized by dark horizontal bar zones running across the midsection.

Aquarium Husbandry & Mid-Water Mouthbrooding

Adult lengths typically range from 4.5 to 5.5 inches (11–14 cm). Because they are hyper-active open-water endurance swimmers that must be kept in schools to feel secure, they demand spacious aquariums measuring at least 4 to 5 feet in length (75 to 125 gallons minimum). They must always be kept in groups of 10 or more individuals (ideally with a mix of multiple males and females).

Replicate their native pelagic biotope by providing massive, completely unobstructed horizontal swimming corridors across the center and upper tiers of the aquarium. Rocks should be kept minimal and confined purely to the background or sides.

They are highly advanced **maternal mouthbrooders** that exhibit a fascinating reproductive quirk: they spawn completely in mid-water. The female releases an egg into the open water column, rapidly swims backward to scoop it up in her mouth before it hits the substrate, and nips at the male's anal fin to receive fertilization. They are incredibly peaceful dither fish that act as perfect tankmates for bottom-dwelling shell-dwellers (*Lamprologini*) or featherfins (*Ectodini*). In captivity, they eagerly accept premium commercial flakes, cyclops, daphnia, and baby brine shrimp.