© George Berninger Jr. / CC BY-SA 4.0Marbled lungfish
Protopterus aethiopicus, the marbled lungfish, is a large air-breathing fish from eastern and central Africa. Its grey body is marked with black marbling, and its pectoral and pelvic fins are long and thread-like. It grows to 200 cm at most, with around 130 cm typical, which makes it one of the largest lungfish. Its ancient, lung-assisted way of life is fascinating, but the real challenge is housing it for life. It suits experienced keepers, so plan carefully before bringing one home.
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Apply as a breederMarbled lungfish key facts
- Care level
- Advanced
- Lifespan
- Few reliable data
- Size
- Up to 200 cm TL, commonly about 130 cm (FishBase)
- Temperature
- 25〜30℃
- Diet
- Mainly carnivorous (fish, molluscs, shrimp, sinking prepared food)
- Water Temperature & Quality
- 25-30°C (FishBase). Heavy waste output demands high-capacity filtration and regular water changes.
- Aquarium
- Adults far exceed 1 m, so lifelong care needs an extra-large tank or pond with a big footprint. Leave an air gap and use a heavy, secure lid.
- Tank Mates & Compatibility
- Eats anything that fits in its mouth and is often aggressive; keep it alone.
- Diet & Feeding
- Feed fish pieces, prawn, mussel, earthworms and sinking prepared food, reducing frequency as it grows.
- Breeding & Egg-laying
- Breeding in home aquaria is not realistic.
- Health & Cautions
- It needs access to air at the surface. Protect heaters and other equipment. Never release it into the wild.
About Marbled lungfish
The marbled lungfish (Protopterus aethiopicus) is a large African lungfish with black marbling on grey, reaching up to 200 cm. It suits experienced keepers, and lifelong housing needs planning.
7 things to know before welcoming a Marbled lungfish
1Adults grow huge
Adults typically reach around 130 cm and can grow up to 200 cm. Do not judge by the size of a juvenile; plan the tank and its location for the full adult size from the start.
2Plan for life
Reliable data on lifespan is scarce, so it is hard to say how many years you will be committed. Assume a long stay and confirm beforehand that you can house a full-grown adult for life.
3Secure the lid
This is a large, powerful fish, so use a lid that cannot easily be pushed off. Check gaps and pipe openings as well, and leave no room to escape.
4Air-breathing needs
It breathes with lungs as well as gills, so you will see it rise to gulp air. Leave an air space between the water surface and the lid so it can breathe whenever it needs to.
5Tankmates need care
As a large carnivore, it may eat any fish small enough to fit in its mouth. Treat solo keeping as the baseline, and if you consider tankmates, judge their size and temperament very carefully.
6Filtration and changes
A big body and a big appetite mean the water fouls quickly. Build in filtration capacity to spare, and make water testing and water changes a routine.
7Feeding and handling
It is a carnivore, so base its diet on animal-based foods and remove uneaten food promptly. Its jaws are reportedly strong, so keep your hands away from its mouth during tank work.
Frequently asked questions about Marbled lungfish
- Q.Can a beginner keep one?
- A.It is rated for experienced keepers. Since it typically reaches about 130 cm and up to 200 cm, you first need to be sure you can provide the equipment and space.
- Q.How large does it get?
- A.It is typically around 130 cm in total length, with records up to 200 cm (FishBase). It is among the largest lungfish, so the setup must suit a full-grown adult.
- Q.How long does it live?
- A.Data on lifespan is limited, so no firm figure can be given. Consider whether to bring one home with the possibility of a long commitment in mind.
- Q.Can it live with other fish?
- A.It is a large carnivore and may eat fish small enough to swallow. Solo keeping is the baseline, and any tankmates need careful consideration.
- Q.Is gulping air at the surface normal?
- A.Yes. It breathes with lungs as well, so rising to take air is natural behavior. Keep an air space between the water surface and the lid.
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