This unusual and fascinating amateur film from the 1930s features microscopic images of a village pond's tiniest inhabitants - using techniques which, while familiar today, are remarkable for the time. In this hidden world we see planiarian worms and daphnia, a common water-flea, which is food for creatures like the hungry mayfly larva which follows. Last of all is the remarkable hydra, waving its sinister stinging tentacles about, waiting for that unwary passer-by.