Killifish
The most beautiful fish you've never heard of — tiny, jewel-toned, and some species live only 6 months in the wild. Colors so intense they look painted: electric blue, fiery red, shimmering gold. Complete guide: the difference between annual and non-annual species, why ALL killifish are escape artists, and the unique eggs that can be mailed DRY around the world.
📋 Species Overview
⏳ Annual vs Non-Annual — The Ultimate Live-Fast Lifestyle
Annual Killifish (Nothobranchius, Fundulopanchax) live in temporary pools in Africa that dry up completely for months. Their entire lifecycle — hatch, grow, breed, die — happens in 3-12 months during the rainy season. Their eggs survive in dry mud (diapause) until the next rains. This means annual Killifish are SHORT-LIVED — often just 6-12 months in the aquarium, though they can live 12-18 months with optimal care. Non-annual Killifish (Aphyosemion, Epiplatys) live in permanent water bodies and live 2-5 years. They're less spectacularly colored than annuals but live longer.
📦 Eggs That Travel DRY — The Killifish Hobby's Secret
Annual Killifish eggs can be incubated in damp peat moss and MAILED dry anywhere in the world. This unique biology created the "Killifish exchange" community — hobbyists trade eggs by mail, add water, and hatch them weeks later. It's the only fish you can receive in an envelope.