Warmouth
Lepomis gulosus
- Tank length
- 120 cmabout 4 ft (47 in)
- Start with
- 1
- Temperature
- 10–20 °C50–68 °F
- pH
- 7–7.5
- Adult size
- 18 cm7 in
- Lifespan
- 6–10 yrs
Bass-like ambush sunfish with a large mouth; keep only with fish it cannot swallow.Bass-like ambush sunfish with a large mouth; keep only with fish it cannot swallow.
Tank sizes
Good tankmates
Avoid with
- Acei cichlid
No shared pH rangeNo shared pH range
- African butterfly cichlid
No shared temperature rangeNo shared temperature range
- Agassiz's cory
No shared temperature rangeNo shared temperature range
- Ajamaru rainbowfish
No shared temperature rangeNo shared temperature range
Amano shrimpWarmouth may eat Amano shrimpWarmouth may eat Amano shrimp
- American flagfish
Warmouth may eat American flagfishWarmouth may eat American flagfish
- Angfa rainbowfish
No shared temperature rangeNo shared temperature range
- Arfak rainbowfish
No shared temperature rangeNo shared temperature range
Assassin snailWarmouth may eat Assassin snailWarmouth may eat Assassin snail
- Banded gourami
No shared temperature rangeNo shared temperature range
- Bandit cory
No shared temperature rangeNo shared temperature range
- Banjo catfish
No shared temperature rangeNo shared temperature range
Data used by the planner
| Temperature | 10–20 | AqAdvisor (aqadvisor.com), retrieved 2026-10-04; agrees with FishBase (fishbase.se), retrieved 2026-10-04 · medium confidence |
|---|---|---|
| pH | 7–7.5 | AqAdvisor (aqadvisor.com), retrieved 2026-10-04; agrees with FishBase (fishbase.se), retrieved 2026-10-04 · medium confidence |
| Hardness (dGH) | 10–20 | AqAdvisor (aqadvisor.com), retrieved 2026-10-04; agrees with FishBase (fishbase.se), retrieved 2026-10-04 · medium confidence |
| Origin | Eastern and central USA | 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 | sedentary | curated-v0 (needs expert review) · medium confidence |
| Swimming level | middle | 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) | 6–10 | curated-v0 (needs expert review) · low confidence |
| Months to adult size | 24 | curated-v0 (needs expert review) · low confidence |
| Safe with plants | Yes | curated-v0 (needs expert review) · medium confidence |
| Minimum tank length | 120 | curated-v0 (needs expert review) · medium confidence |