This is Bryophyllum caudatum, one of my first discoveries and a very special single-celled organism, at least for me. 😂 . Bryophyllum caudatum is about half a millimeter in length and has a strange, curling tail-like structure. When it swims, it glides upside-down just beneath the water-air surface while its tail dangles into the water. The tail carries many tiny, needle-like structures that the organism uses to capture food. Maybe its purpose is to create a larger surface area, increasing the