Based on true events

I believe that he was never so frightened in his life. To be displaced from the cool lake water, to be removed from his beloved sunlight, to be taken from his freedom in the clear water was not at all pleasing to him. Yes, there were predatory fish and crustaceans and birds in and on that lake, all of them quite hungry for him or causing him peril, but he was still free to roam. But then came a great torrent which took him from his placid swimming, and sucked him into a hot cage, and for an hour he remained there in fear as the condensation which was once its beloved water collected upon the plastic sides of the container.  Where, indeed, was he going? And how hot it was becoming! The water and the sand beneath were rocking to a rhythm, and I daresay he would have been sea sick, if that was at all possible.  Finally, the movement shifted as his cage was lifted up, and taken into a cool house, and there remained for some time. Here, he could collect his scattered wits, and he began to snoop in the sand at the bottom of the container, conversing with his friends, bumping into tiny plants and even nibbling at this and that when he felt so inclined. But his adventure was not over. Before he knew it, he was scooped up without ceremony, along with the silt which was about him, and plopped on some smooth surface so bright that he believed himself to be transparent. It was so piercing. Up above, though, he did not behold, as he rushed to and fro in this new world, was the eye of a microscope, and the owner of the microscope was observing him with the utmost pleasure, crying out in delight: “There’s something here that looks like a Paramecium, and my, it’s zipping about like a hen without it’s head!” And, thankfully, after a little while, he was replaced in the water, and after that he became used to his new surroundings and lived happily ever after.

Protozoa
Kingdom Protozoa

These are animals and plants that are made of only a single cell. They may be covered in tiny hairs which beat to propel them, or one single hair to preform the task. Some can not be distinctly classified as animals or plants, for, as a loose rule, plant  protozoa can not move while animal protozoa can, so those plant cells which can move are a puzzle.  A very well known protozoa is the jelly-like Amoeba which can mould itself into any shape it wants. The Paramecium mentioned is a rather oval creature with slightly pointed ends and hairs all over them for movement. They have a mouth and a gullet used for feeding, and are considered a very complex protozoa.