| Text | Length |
| Stagnant water problem | 22 |
| Simple water dweller | 20 |
| Sargassum, e.g. | 15 |
| Pond scum component | 19 |
| Piece of scum | 13 |
| Kelp, for one | 13 |
| Fish food | 9 |
| Film bit | 8 |
| Chlorophyllous plant | 20 |
| Chlorophyll plant | 17 |
| Birdbath bit | 12 |
| Aquarium organism | 17 |
| Agar source | 11 |
| Tiny organism that's often pluralized | 41 |
| Snack for a surgeonfish | 23 |
| Seaweed, for one | 16 |
| Sea lettuce, for one | 20 |
| Sea grass, e.g. | 15 |
| Rootless water life | 19 |
| Rockweed | 8 |
| Primitive water plant | 21 |
| Part of a pond problem | 22 |
| It creates energy through photosynthesis | 40 |
| Green organism | 14 |
| Blue-green growth | 17 |
| Blue-green birdbath bit | 23 |
| Bit of phytoplankton | 20 |
| Bit of ocean flora | 18 |
| Bit of aquarium growth | 22 |
| Anabaena | 8 |
| Water silk, e.g. | 16 |
| Unwanted swimming pool bit | 26 |
| Unwanted plant in a pool | 24 |
| Unwanted aquarium collection | 28 |
| Unicellular plant | 17 |
| This plus a fungus equals a lichen | 34 |
| Stillwater growth | 17 |
| Stagnant water growth | 21 |
| Spirulina, e.g. | 15 |
| Spirogyra or frog spit | 22 |
| Some plankton | 13 |
| Snapper's snack | 19 |
| Simple aquatic organism | 23 |
| Seaweed. | 8 |
| Seaweed plant | 13 |
| Seabeard, e.g. | 14 |
| Sea plant | 9 |
| Sea moss constituent | 20 |
| Sea greenery | 12 |
| Salt water growth | 17 |
| Rootless pond growth | 20 |
| Rootless aquatic plant | 22 |
| Rockweed, for one | 17 |
| Rockweed is one | 15 |
| Primitive water organism | 24 |
| Primitive plant | 15 |
| Pool organism | 13 |
| Pool microorganism | 18 |
| Pond-scum component | 19 |
| Pond tidbit | 11 |
| Pond scum organism | 18 |
| Pond scum e.g. | 15 |
| Pond life form | 14 |
| Pond annoyance | 14 |
| Plant that's often pluralized | 33 |
| Plankton part | 13 |
| Plankton morsel | 15 |
| Plankton minutia | 16 |
| Piece of pond scum | 18 |
| Phycological unit | 17 |
| Pesky pool plant | 16 |
| Part of many a snail's diet | 31 |
| Oxygen releaser | 15 |
| Mussel morsel | 13 |
| Morsel for a sea snail | 22 |
| Morsel for a guppy | 18 |
| Minuscule lake plant | 20 |
| Microscopic pond organism | 25 |
| Microscopic life | 16 |
| Lowlife? | 8 |
| Lake plant | 10 |
| Lake organism | 13 |
| It lacks roots | 14 |
| Frog spit, e.g. | 15 |
| Foot of a food chain | 20 |
| Filamentous plant | 17 |
| Fat-choy or nostoc | 18 |
| Eukaryotic organism | 19 |
| Diatom or nostoc | 16 |
| Diatom | 6 |
| Component of a lichen | 21 |
| Chlorophyta bit | 15 |
| Chlorophyll-containing organism | 31 |
| Chlorophyll-containing microorganism | 36 |
| Chlorophyll source | 18 |
| Certain prokaryote | 18 |
| Bit of stagnant-water growth | 28 |
| Bit of seaweed | 14 |
| Bit of scum | 11 |
| Bit of rootless flora | 21 |
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