Large parts of our ecosystem function through membranes and concentration gradients. In our developments, we are yet to take advantage of this. Under the title Membrains, we want to find new possible applications. In particular, we are looking at the so-called "salps". ‘At first glance, they seem like jellyfish, but they are not. Salps take in food by filtering it through a membrane. Special is, that they can control the pore size of their membrane, even though this may seem counterintuitive at first.Visit them at: https://www.ja.tum.de/ja/projekte/2022/membrains/.