Cyprichromis Leptosoma
Cyprichromis leptosoma
Min Tank Size
300L
Adult Size
11 cm
Lifespan
8 years
School Size
12+
About
Found in the open water columns of Lake Tanganyika, Cyprichromis leptosoma is one of those species that breaks the mold for what people expect from a cichlid. Most cichlids are territorial substrate-huggers, but these guys live and school in mid-water, often hundreds of meters from shore in the wild.
Males are genuinely stunning, displaying either vivid yellow or brilliant blue on their tail fins depending on which geographic population they come from. Females are more subdued, a silvery-brown that still has a certain elegance when a large group moves together.
5. Temperature sits comfortably between 24 and 27 Celsius. A tall tank matters more than a long one for this species, since they spend their lives swimming in open water, not near the bottom or surface. Diet should consist of high-quality small foods, frozen mysis, cyclops, and quality micro-pellets are all accepted readily. They're planktivores by nature so anything small and meaty works well.
Because they're open-water schoolers, the colony dynamic is critical to their wellbeing. A group of fewer than 12 will feel exposed and stressed, which brings out the worst in dominant males. Get the numbers right and you'll be rewarded with one of the most naturally beautiful displays in the Tanganyika hobby.
Water Parameters
Temperature
°CpH
GH
dGHKH
dKHSwimming Level
Flow Preference
Keeping multiple Cyprichromis Leptosoma together
Cyprichromis Leptosoma are shoaling fish and need company of their own kind. Keep a group of at least 12. Smaller groups leave them stressed, washed-out in color, and prone to hiding.
Compatibility
Cyprichromis leptosoma works best in Tanganyika community setups alongside other non-aggressive lake species. Good pairings include Julidochromis species, smaller Altolamprologus, and Neolamprologus shell-dwellers, all of which occupy different tank zones and won't compete for mid-water space. Avoid any cichlid large or aggressive enough to view them as prey or to disrupt their schooling behavior, mbuna from Lake Malawi are a poor choice both temperamentally and in terms of water chemistry overlap. Because Cyprichromis are planktivores and peaceful, they make excellent dither fish for shy Tanganyikan species. Keep shrimp out of this tank, they'll be eaten.
Commonly kept with
Species this one is most often paired withCommonly tried but avoid
Often paired, but shouldn't beCare Notes
The most common mistake is keeping too few fish. People buy six, see stress behavior and fighting, and assume the fish are incompatible or aggressive when the real fix is simply more individuals. Twelve should be the absolute floor. Water quality and hardness are non-negotiable since these fish have no tolerance for soft or acidic conditions. Mouthbrooding females fast for several weeks, so watch them closely during this period to ensure they're not being outcompeted for food once they release fry. A tightly fitted lid is recommended since stressed individuals can jump.
Behavior & Aggression
Aggression in this species is almost entirely male-on-male, playing out as persistent chasing and display behavior as males compete for dominance and breeding positions within the school. It rarely escalates to serious injury, especially when the group is large enough. Cramped tanks or undersized groups concentrate aggression onto weaker individuals, which can result in one male being harassed constantly. Keeping ratios skewed toward females, ideally two or more females per male, helps spread the tension. Mixing color variants from different geographic locations also increases male conflict.
Things to Know
- Keep in groups of 12+, smaller groups cause stress and male aggression
- Geographic color variants (blue tail vs yellow tail) should not be mixed
- Males will spar for dominance, skew ratio toward more females
- Mouthbrooding females stop eating for 3-4 weeks, monitor closely
- Tank must be tall with open mid-water swimming space
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