Aphyosemion poliaki
 
Aphyosemion poliaki
Common names: Poliaki Killifish
 
Overview
Aphyosemion poliaki is a striking and somewhat uncommon West African killifish closely related to A. bitaeniatum and A. gardneri. It is known for its electric blue body sheen, dense red spotting, and bold fin colouration. Some populations show yellow or orange edging on the dorsal and caudal fins, giving them a high-contrast appearance.
This species is peaceful, moderately hardy, and highly rewarding for enthusiasts who enjoy less-common Aphyosemion species. It thrives in planted aquaria and adapts well once stable water conditions are maintained.
 
Distribution
Cameroon and Nigeria border regions
Shallow forest streams, seepages, and shaded wetlands
Soft, acidic, slow-moving water with dense plant cover and leaf litter
Note: This species is often collected alongside other Aphyosemion forms in peat-influenced microhabitats.
 
Size
4.5–6 cm
Males larger with longer fins
 
Lifespan
2–3 years
Cooler water improves longevity
 
Appearance
Iridescent blue-to-green body with red spotting
Red or orange fin edging (population dependent)
Males: elongated dorsal and anal fins, vivid colouration
Females: smaller, brownish, with minimal markings
The species has a refined, slender shape and often displays a neon sheen under low lighting.
 
Behaviour & Temperament
Peaceful, active, and display-oriented males
Best kept as a pair or 1M:2F trio
Requires tight-fitting lid — strong jumpers
Becomes bold and visible in densely planted tanks with shaded areas
 
Aquarium Requirements
Tank Size
25–40 L for a pair or trio
Larger tanks show more natural displaying behaviour
 
Water Parameters
Temperature: 20–24°C
pH: 5.5–7.0
GH: 1–6 dGH
Prefers soft, slightly acidic conditions
Stable water quality is essential
 
Substrate & Décor
Dark sand or fine gravel
Dense plants (Java moss, Ceratophyllum, Nymphaea, Anubias)
Floating plants for shade and security
Leaf litter to mimic natural habitat
Spawning mops if breeding
 
Filtration & Flow
Gentle sponge filter
Avoid strong current
Clean, stable water preferred
 
Diet
A micropredator with preference for live foods:
Baby brine shrimp
Daphnia
Mosquito larvae
Microworms
Grindal worms
Accepts frozen foods readily.
High-quality micro-pellets/soft granules once settled.
Small, frequent feedings enhance colour and health.
 
Tankmates
 
Good choices
Small peaceful tetras
Pencilfish
Rasboras
Pygmy Corydoras
Otocinclus
Adult shrimp
Avoid
Fast, boisterous fish
Fin-nippers
Large or aggressive species
Other killifish except in very large aquaria
Often ideal in species-only setups.
 
Breeding
Moderately easy and productive.
 
Spawning
Use mops, moss, or fine plants
Pair or trio will spawn regularly
Adhesive eggs deposited singly or in small groups
Remove eggs/mops for higher fry survival
 
Incubation
12–18 days depending on temperature
Non-annual — eggs incubate in water only
Fry Care
Infusoria or microworms for initial feeding
Baby brine shrimp soon after hatching
Keep water clean and shallow for early growth
Fry grow steadily with warmth and frequent feeding
 
Care Level
Moderate
Main considerations:
Sensitive to poor water quality
Strong jumpers
Benefits from soft, acidic, stable conditions
Shows best colour with high-quality live foods