10 aquarium fish that live the longest: Some can even outlive you

Aquariums are becoming a favourite home hobby, and many people are amazed to learn that some fish can live for decades with the right care. Clean water, enough space and proper food can help certain species live much longer than expected. Here are 10 aquarium fish known for their impressive lifespans, perfect for anyone planning a long-term tank.
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Images: Canva (for representative purposes only)

Goldfish can live 10 to 30 years when kept in a spacious tank or pond with good filtration. Many people don’t know they can reach old age with proper care. Goldfish stay healthiest in tanks where the water is clean and the space is not overcrowded.

Koi are famous for their long lifespan, often living 25 to 50 years in clean, well-maintained ponds. Most koi live for decades and grow quite large. Their bright colours and calm swimming make koi a beautiful addition to outdoor ponds.

Some sturgeon species, like lake and beluga sturgeon, can live 50 to over 100 years when kept in large ponds or tanks. These fish are usually kept by experienced hobbyists. Sturgeons need cool, oxygen-rich water, which helps support their long lifespan.

Clown loaches can live 15 to 25 years when they have clean water, hiding spots and a peaceful environment. They are active, colourful fish that enjoy company. Clown loaches are happiest when kept in groups, which boosts their energy and mood.

Angelfish usually live 10 to 15 years in a clean, stable and well-planted aquarium. Their tall fins and graceful swimming make them a popular choice. They prefer tanks with enough height, as their fins grow long and elegant.

Oscar fish can live 10 to 20 years with a large tank, strong filtration and a protein-rich diet. They’re intelligent and often recognise their owners. Oscars grow fast, so they need plenty of space to move comfortably.

Plecos often live 10 to 20+ years, depending on the species. Many grow very large and need big tanks with plenty of hiding spaces. Their algae-eating habits help keep tanks clean, making them a useful addition.

Discus fish live 10 to 15 years with warm, clean and stable water. They are sensitive but extremely rewarding to keep due to their stunning colours. They thrive best in calm tanks with peaceful tankmates and soft lighting.

African cichlids can live 10 to 15 years when kept in hard, mineral-rich water. They are colourful, active and full of personality. Their playful yet bold behaviour makes them one of the most entertaining aquarium fish.

Betta fish can live 2 to 5 years with clean water, gentle filtration and proper feeding. Their long fins make them slow swimmers who prefer calm water. Male bettas do best alone because they can become territorial around other males.