The last of three water egg groups, Water 3 is a mix of different pokemon types, including fossil pokemon, crabs and invertebrates.
| # | Name | Other group |
|---|---|---|
| 072 | Tentacool | |
| 073 | Tentacruel | |
| 090 | Shellder | |
| 091 | Cloyster | |
| 098 | Krabby | |
| 099 | Kingler | |
| 120 | Staryu | |
| 121 | Starmie | |
| 138 | Omanyte | Water 1 |
| 139 | Omastar | Water 1 |
| 140 | Kabuto | Water 1 |
| 141 | Kabutops | Water 1 |
| 222 | Corsola | Water 1 |
| 341 | Corphish | Water 1 |
| 342 | Crawdaunt | Water 1 |
| 345 | Lileep | |
| 346 | Cradily | |
| 347 | Anorith | |
| 348 | Armaldo | |
| 451 | Skorupi | Bug |
| 452 | Drapion | Bug |
| 564 | Tirtouga | Water 1 |
| 565 | Carracosta | Water 1 |
| 566 | Archen | Flying |
| 567 | Archeops | Flying |