| Creature | Terrain | Climate | Campaign | Reference |
|---|---|---|---|---|
| Bass, Giant | Water, Fresh | Any | Any | DRC 177 |
| Beetle, Water | Water, Fresh | Any | Any | MM 18 |
| Bunyip | Water, Fresh | Temperate | Any | MAIII 16 |
| Crayfish, Giant | Water, Fresh | Temperate | Any | MM 50 |
| Frog, Giant | Water, Fresh | Any | Any | MM 119 |
| Frog, Killer | Water, Fresh | Any | Any | MM 119 |
| Frog, Poisonous | Water, Fresh | Any | Any | MM 119 |
| Ixitxachitl, Ixzan | Water, Fresh | Any | Any | MAIII 64 |
| Ixitxachitl, Ixzan, Mutant | Water, Fresh | Any | Any | MAIII 64 |
| Ixitxachitl, Ixzan, Priest | Water, Fresh | Any | Any | MAIII 64 |
| Ixitxachitl, Ixzan, Vampiric | Water, Fresh | Any | Any | MAIII 64 |
| Ixitxachitl, Ixzan, Wizard | Water, Fresh | Any | Any | MAIII 64 |
| Naga, Water | Water, Fresh | Any | Any | MM 266 |
| Quipper | Water, Fresh | Any | Any | MM 117 |
| Spider, Giant, Water | Water, Fresh | Temp/Trop | Any | MM 326 |
| Termite, Water, Fresh | Water, Fresh | Any | Any | DRC 209 |
| Troll, Freshwater | Water, Fresh | Any | Any | MM 349 |
| Vodyanoi | Water, Fresh | Any | Any | MM 352 |