Title: Investigating the collective motion of the nematodes (Turbatrix aceti) in a flexible boundary

Vinegar eels (Turbatrix aceti) are microscopic worms that are able to synchronize their body oscillations to produce metachronal waves. In this collective state, the nematodes are able to generate a strong pushing force, which allows them to deform barriers between two unlike liquids, creating filaments protruding from one liquid to another. Our research is aimed at studying which parameters affect the creation and the shape of the filaments. To study the filaments we put a sample of nematodes on a surface, and once they form a collective state, we cover them with another liquid. Filaments consisting of several nematodes would emerge from the center of the sample. The filaments are not stationary, but oscillate in and out of the droplet. The physical properties of the different liquids greatly affect how these filaments behave. The next step would be to develop a simple theoretical model that will explain the creation of the filaments.