Killifish, also known as Livebearers in some contexts, are a diverse group of small, brightly coloured freshwater fish native to tropical and subtropical regions worldwide, excluding Australia and Antarctica. They are especially renowned for their beautiful, vivid patterns and compact size, typically ranging from 1 to 6 inches. Killifish have fascinating lifecycles: many species are annual, living in temporary pools where their eggs can survive dry spells by entering a state called diapause, while non-annual types inhabit more permanent waters and live several years. Their temperament is generally peaceful, making them suitable for community aquariums, though care must be taken to replicate their natural water conditions and maintain water quality. Killifish are particularly popular among aquarium enthusiasts in the UK for their vibrant appearance and unique breeding habits. Popular search terms include "killifish for sale" and "killifish for sale near me," reflecting interest in acquiring these captivating fish as pets. Overall, killifish are an excellent choice for hobbyists seeking an engaging and colourful addition to their aquariums, provided their specific habitat needs are met.
Many killifish species are peaceful and can thrive in community aquariums with other small, peaceful fish like danios, tetras, and rasboras, though some species such as the Golden Wonder Killifish and Blue Gularis are more aggressive and are best kept alone or with robust tankmates. It's important to research the specific killifish species before introducing them to a community tank, as temperament and compatibility can vary.