Tracklist
| A1 | Hydra |
| A2 | St George And The Dragon |
| A3 | 99 |
| A4 | Lorraine |
| B1 | All Of Us Boys |
| B2 | Mama |
| B3 | White Sister |
| B4 | A Secret Love |
Notes
US releaseOther versions
| Category | Artist | Title (Format) | Label | Category | Country | Year |
|---|---|---|---|---|---|---|
| FC 36229 | Toto | Hydra (LP, Album, Gat) | Columbia | FC 36229 | US | 1979 |
| HLS 460641 | Toto | Hydra (LP, Album) | Harmony | HLS 460641 | Mexico | 1979 |
| 25AP 1700 | Toto | Hydra (LP, Album, Gat) | CBS/Sony | 25AP 1700 | Japan | 1979 |
| 83900 | Toto | Hydra (LP, Album, Gat) | CBS | 83900 | Portugal | 1979 |
| 40-83900 | Toto | Hydra (Cass, Album, RE) | CBS | 40-83900 | Italy | 1979 |
