Eel-tailed catfish
Tandanus tandanus
- Tank length
- 240 cmabout 8 ft (94 in)
- Start with
- 1
- Temperature
- 10–26 °C50–79 °F
- pH
- 6.4–7.5
- Adult size
- 45 cm18 in
- Lifespan
- 8–15 yrs
Grows to a large, powerful predator that eats any fish it can swallow; needs a very large tank and is regulated in some regions.Grows to a large, powerful predator that eats any fish it can swallow; needs a very large tank and is regulated in some regions.
Tank sizes
Good tankmates
Avoid with
- Acei cichlid
No shared pH rangeNo shared pH range
- African butterfly cichlid
Eel tailed catfish may eat African butterfly cichlidEel tailed catfish may eat African butterfly cichlid
- African clawed frog
Eel tailed catfish may eat African clawed frogEel tailed catfish may eat African clawed frog
- Agassiz's cory
Eel tailed catfish may eat Agassiz's coryEel tailed catfish may eat Agassiz's cory
- Ajamaru rainbowfish
Eel tailed catfish may eat Ajamaru rainbowfishEel tailed catfish may eat Ajamaru rainbowfish
Amano shrimpEel tailed catfish may eat Amano shrimpEel tailed catfish may eat Amano shrimp
- American flagfish
Eel tailed catfish may eat American flagfishEel tailed catfish may eat American flagfish
- Angfa rainbowfish
Eel tailed catfish may eat Angfa rainbowfishEel tailed catfish may eat Angfa rainbowfish
- Arfak rainbowfish
Eel tailed catfish may eat Arfak rainbowfishEel tailed catfish may eat Arfak rainbowfish
Assassin snailEel tailed catfish may eat Assassin snailEel tailed catfish may eat Assassin snail
- Banded gourami
Eel tailed catfish may eat Banded gouramiEel tailed catfish may eat Banded gourami
- Bandit cory
Eel tailed catfish may eat Bandit coryEel tailed catfish may eat Bandit cory
Data used by the planner
| Temperature | 10–26 | AqAdvisor (aqadvisor.com), retrieved 2026-10-04 · low confidence |
|---|---|---|
| pH | 6.4–7.5 | AqAdvisor (aqadvisor.com), retrieved 2026-10-04 · medium confidence |
| Hardness (dGH) | 5–25 | AqAdvisor (aqadvisor.com), retrieved 2026-10-04 · medium confidence |
| Origin | Murray Darling basin and eastern coastal rivers, Australia | curated-v0 (needs expert review) · low confidence |
| Beginner friendly | No | curated-v0 (needs expert review) · medium confidence |
| Care level | advanced | curated-v0 (needs expert review) · medium confidence |
| Activity | moderate | curated-v0 (needs expert review) · medium confidence |
| Swimming level | bottom | curated-v0 (needs expert review) · medium confidence |
| Temperament | predatory | curated-v0 (needs expert review) · medium confidence |
| Nips fins | No | curated-v0 (needs expert review) · medium confidence |
| Long fins | No | curated-v0 (needs expert review) · medium confidence |
| Territorial | Yes | curated-v0 (needs expert review) · medium confidence |
| Lives in groups | No | curated-v0 (needs expert review) · medium confidence |
| Minimum group | 1 | curated-v0 (needs expert review) · medium confidence |
| Diet | carnivore | curated-v0 (needs expert review) · medium confidence |
| Lifespan (years) | 8–15 | curated-v0 (needs expert review) · low confidence |
| Months to adult size | 36 | curated-v0 (needs expert review) · low confidence |
| Safe with plants | Yes | curated-v0 (needs expert review) · medium confidence |
| Minimum tank length | 240 | curated-v0 (needs expert review) · medium confidence |