| Level 1 | Thriving Requirement 1: Waterfall and Metal Frame, at least 2 | | |
| Level 2 | Thriving Requirement 2: at least 30 objects or plants with the Aquatic tag; Hippopotamus Fact Sheet | | |
| Level 3 | Release groups and release to the wild | | |
| Level 4 | Thriving Requirement 3: Food Grade 2; Fertility Level 1 (+15% fertility) | Before this level: an Observation Network (Observation Platform) in Tanzania Reserve and this species released in Tanzania Reserve | |
| Level 5 | Thriving Requirement 4: Rubbing Pillar, at least 3 | | |
| Level 6 | Thriving Requirement 5: Barrel Feeder - Hanging, at least 2; Fertility Level 2 (+30% fertility) | | |
