Hypsolebias coamazonicus Killifish (Hypsolebias coamazonicus) A true collector's species, Hypsolebias coamazonicus is an exceptionally rare annual killifish admired for its brilliant iridescent colours and fascinating life cycle. Best suited to experienced aquarists, this South American species is a rewarding choice for dedicated killifish enthusiasts and breeding projects. Quick Facts Scientific name: Hypsolebias coamazonicus Common name: Hypsolebias Coamazonicus Killifish Adult size: Approximately 4–6 cm Tank size: 20L+ recommended Difficulty: 🔴 Advanced Temperament: Peaceful Best kept: Pairs or breeding groups Is this for you? ✔️ Perfect if: You're an experienced killifish keeper. You enjoy keeping rare and unusual species. You're interested in breeding annual killifish. You can provide stable water conditions and specialised care. ❌ Avoid if: You're new to fishkeeping. You want a community aquarium fish. You keep large or aggressive tank mates. You cannot dedicate time to specialised breeding techniques. Why choose Hypsolebias coamazonicus? Hypsolebias coamazonicus is one of the more sought-after South American annual killifish, prized for the spectacular colours displayed by mature males. Depending on the population and lighting, males can exhibit vibrant shades of metallic blue, turquoise, crimson and orange with intricate spotting and fin patterns. In the wild, this species inhabits temporary seasonal pools that disappear during the dry season. Their eggs survive buried within the substrate until the rains return, making their natural life cycle one of the most fascinating in the aquarium hobby. Because of their specialised biology, this species is generally recommended for experienced aquarists who appreciate rare fish and wish to work with annual killifish breeding techniques. Benefits Rare and highly collectible annual killifish Brilliant metallic breeding colours Ideal for dedicated breeding projects Perfect for species aquariums Unique annual life cycle Highly rewarding for experienced hobbyists Care made simple Temperature: 22–25°C pH: 5.8–7.0 Diet: Live foods, frozen foods and premium micro pellets Water: Soft, clean and stable with gentle filtration Setup: Species aquarium with fine spawning substrate, floating plants and subdued lighting Lid: A tightly fitting lid is essential, as killifish are excellent jumpers. Perform small, regular water changes to maintain pristine water quality. Pairs perfectly with Species-only aquariums Dedicated killifish breeding setups Fine spawning substrate Floating plants Indian Almond Leaves NTA Insight: Unlike non-annual killifish, Hypsolebias coamazonicus has evolved to survive seasonal droughts. In breeding programs, the eggs are often collected from peat or spawning substrate and incubated under controlled conditions before being rehydrated to hatch. Their fascinating life cycle is one of the reasons annual killifish are so highly regarded among specialist aquarists. FAQ How big does Hypsolebias coamazonicus grow? Adults typically reach around 4–6 cm, with males displaying the brightest colours during breeding condition. Is this species suitable for beginners? No. This species is best suited to experienced aquarists due to its specialised care requirements and annual breeding cycle. What does "annual killifish" mean? Annual killifish naturally inhabit temporary pools that dry out seasonally. Their eggs survive the dry period before hatching when water returns, making their life cycle very different from most freshwater fish. Can they live in a community aquarium? They are best maintained in a species aquarium or with very carefully selected peaceful companions, as their specialised care requirements are easier to meet in a dedicated setup. Do they require live food? While many individuals accept frozen and prepared foods, regular live or frozen foods are strongly recommended to maintain excellent health, colour and breeding condition.
