| Season | 1 |
| Named After | Kadavu Island, Fiji |
| Original Members | 6 |
| Dissolved | Episode 10 (merged into Vanua) |
| Wins | 3 |
| Losses | 4 |
| Tribal Councils | 4 |
| Voted Out | Darius Webb (E2) Beau Fontaine (E5) Trevor Holt (E6) Lorraine Chu (E8) |
| Color | Purple |
Tribe Kadavu is one of the three original competing tribes of Extinction Island Season 1, named after Kadavu Island — the fourth-largest island in the Fijian archipelago. The tribe had a turbulent run, losing the first immunity challenge in Episode 2 and voting out Darius Webb — the first castaway eliminated all season.
After recovering with back-to-back immunity wins in Episodes 3 and 4, Kadavu collapsed again in Episodes 5, 6, and 8, systematically losing members until only Nadine Kowalski and Tammy Ostrowski remained. Despite being a two-person tribe, Kadavu pulled off a remarkable upset in Episode 9, winning immunity and forcing rival Vanua to Tribal Council. The tribe was officially dissolved in Episode 10 when both remaining members were absorbed into a new Vanua tribe.
Members
| # | Name | Occupation | Age | Status |
|---|---|---|---|---|
| 1 | Nadine Kowalski | Principal | 51 | Active (New Vanua) |
| 2 | Tammy Ostrowski | Antique Shop Owner | 60 | Active (New Vanua) |
| 3 | Darius Webb | Graphic Designer | 36 | Extinction Island (E2) |
| 4 | Beau Fontaine | Aspiring Actor | 22 | Extinction Island (E5) |
| 5 | Trevor Holt | Personal Trainer | 29 | Extinction Island (E6) |
| 6 | Lorraine Chu | Tax Attorney | 44 | Extinction Island (E8) |
Challenge History
| Episode | Challenge | Type | Result |
|---|---|---|---|
| E2 | Tide & Seek | Immunity | Loss |
| E3 | Dead Weight | Immunity | Win |
| E4 | Undertow | Immunity | Win |
| E5 | Feeding Frenzy | Immunity | Loss |
| E6 | Tribal Knowledge | Immunity | Loss |
| E8 | Pressure Drop | Immunity | Loss |
| E9 | Stone Cold | Immunity | Win |
| E10 | — | — | Dissolved — merged into Vanua |