| Aquatic animal |
| Aquatic nesting area |
| Aquatic organism |
| One who studies minute organisms |
| Microscopic organism |
| Amorphous organism |
| Oxygen-requiring microorganism |
| Aquatic dragonfly larva |
| Aquatic silvers |
| Microorganism's locomotion |
| Aquatic appendages |
| Microorganisms |
| Aquatic plant |
| All organisms in one area, collectively |
| Semiaquatic rodent |
| A studier of living organisms |
| Part of an aquatic plant |
| Aquatic cereal grass |
| Bacterial organism |
| Aquatic vegetation |
| Activity of an organism in response to light, e.g. |
| A neat me (anag) — large aquatic mammal |
| Aquatic nymph |
| Living organisms |
| Aquatic mammal |
| Organism needing air to exist |
| Genetically related organisms |
| Tiny aquatic organism |
| Birdbath organism |
| Lizards' semiaquatic look-alikes |