This image is reminiscent of a sharp biotech sword gleaming on a pitch-black night. However, this is a microscopic image of Pseudo-nitzschia pungens (Grunowez leve). The cell size is 8µm wide and 130-170µm in length.

While preparing to observe Prorocentrum sp (Dinophyceae), we accidentally knocked the microscope, resulting in one of the Prorocentrum (size: 20µm x 60µm) on the glass to seemingly dive into the immersion oil. This gave us a surprisingly dynamic image, as shown above.