| Answer | Crossword Clue |
|---|---|
| plankton | microscopic organisms floating in water |
| growth | The increase in number and spread of small or microscopic organisms |
| eyespots | A light-sensitive pigmented spot on the bodies of invertebrate animals such as flatworms, starfishes, and microscopic crustaceans, and also in some unicellular organisms |
| zooplankton | tiny, free-floating organisms in aquatic systems |
| zooplanktons | ZOOPLANKTON, tiny, free-floating organisms in aquatic systems |
| tardigrade | any microscopic, chiefly herbivorous invertebrate of the phylum Tardigrada, living in water, on mosses, lichens, etc. |
