| Species | Adult size | Temperament | Min tank | Care | Accuracy |
|---|---|---|---|---|---|
| Congo Tetra Phenacogrammus interruptus | 6–12 cm | Peaceful | 200 L | Moderate | Verified |
| Convict Cichlid Amatitlania nigrofasciata | 8–12 cm | Aggressive | 180 L | Easy | Verified |
| Convict Hybrid / Mutt Cichlid Amatitlania hybrid | 8–15 cm | Aggressive | 250 L | Moderate | Verified |
| Copadichromis Borleyi Copadichromis borleyi | 14–18 cm | Semi aggressive | 350 L | Moderate | Verified |
| Coral Red Pencilfish Nannostomus mortenthaleri | 2.5–3.5 cm | Peaceful | 60 L | Hard | Verified |
| Costello Tetra Hemigrammus hyanuary | 3.5–4.5 cm | Peaceful | 80 L | Easy | Verified |
| Croaking Gourami Trichopsis vittata | 5–7 cm | Peaceful | 80 L | Moderate | Verified |
| Crystal Red Shrimp Caridina logemanni | 2–3 cm | Peaceful | 30 L | Hard | Verified |
| Ctenopoma Acuticeps Ctenopoma acuticeps | 10–15 cm | Semi aggressive | 180 L | Moderate | Not yet verified |
| Cuckoo Catfish Synodontis multipunctatus | 18–27.5 cm | Semi aggressive | 300 L | Moderate | Verified |
| Cupid Cichlid Biotodoma cupido | 10–15 cm | Peaceful | 300 L | Moderate | Verified |
| Cyprichromis Leptosoma Cyprichromis leptosoma | 8–11 cm | Peaceful | 240 L | Moderate | Verified |