Redtail splitfin
Xenotoca eiseni
- Tank length
- 36 cm14 in
- Start with
- 3
- Temperature
- 15–30 °C59–86 °F
- pH
- 7–8.5
- Adult size
- 6 cm2 in
- Lifespan
- 2–4 yrs
A nippy livebearer that harasses slow or long-finned fish; keep a group with fast, robust tankmates and a cooler winter rest.A nippy livebearer that harasses slow or long-finned fish; keep a group with fast, robust tankmates and a cooler winter rest.
Tank sizes
Good tankmates
Avoid with
- Blue lyretail
Redtail splitfin may nip Blue lyretailRedtail splitfin may nip Blue lyretail
- Brilliant rasbora
No shared pH rangeNo shared pH range
Congo tetraRedtail splitfin may nip Congo tetraRedtail splitfin may nip Congo tetra
- Featherfin squeaker
Redtail splitfin may nip Featherfin squeakerRedtail splitfin may nip Featherfin squeaker
- Filament barb
Redtail splitfin may nip Filament barbRedtail splitfin may nip Filament barb
- Guppy
Redtail splitfin may nip GuppyRedtail splitfin may nip Guppy
Lambchop rasboraNo shared pH rangeNo shared pH range
Pearl gouramiRedtail splitfin may nip Pearl gouramiRedtail splitfin may nip Pearl gourami
Threadfin rainbowfishRedtail splitfin may nip Threadfin rainbowfishRedtail splitfin may nip Threadfin rainbowfish
- African knifefish
African knifefish may eat Redtail splitfinAfrican knifefish may eat Redtail splitfin
- African pike
African pike may eat Redtail splitfinAfrican pike may eat Redtail splitfin
- Alligator gar
Alligator gar may eat Redtail splitfinAlligator gar may eat Redtail splitfin
Data used by the planner
| Temperature | 15–30 | AqAdvisor (aqadvisor.com), retrieved 2026-10-04; agrees with FishBase (fishbase.se), retrieved 2026-10-04 · medium confidence |
|---|---|---|
| pH | 7–8.5 | AqAdvisor (aqadvisor.com), retrieved 2026-10-04 · low confidence |
| Hardness (dGH) | 5–20 | AqAdvisor (aqadvisor.com), retrieved 2026-10-04 · low confidence |
| Origin | Pacific slope rivers of Nayarit and Jalisco, Mexico | curated-v0 (needs expert review) · low confidence |
| Beginner friendly | No | curated-v0 (needs expert review) · medium confidence |
| Care level | moderate | curated-v0 (needs expert review) · medium confidence |
| Activity | active | curated-v0 (needs expert review) · medium confidence |
| Swimming level | middle | curated-v0 (needs expert review) · medium confidence |
| Temperament | semi aggressive | curated-v0 (needs expert review) · medium confidence |
| Nips fins | Yes | curated-v0 (needs expert review) · medium confidence |
| Long fins | No | curated-v0 (needs expert review) · medium confidence |
| Territorial | No | 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 | omnivore | curated-v0 (needs expert review) · medium confidence |
| Lifespan (years) | 2–4 | curated-v0 (needs expert review) · low confidence |
| Months to adult size | 6 | curated-v0 (needs expert review) · low confidence |
| Safe with plants | Yes | curated-v0 (needs expert review) · medium confidence |