Nets are such a commonly used tool to capture fish out of aquariums, but in reality, these are actually very damaging to the fish. The mesh material often gets caught on the fish’s fins, gill plates, and mouth, and pretty much the only way to free it is to carefully pull on it until it is released. To get by these issues, we recommend to not use a net, but that’s obviously easier said than done. Whenever possible, use fish traps to capture the fish and small specimen containers for transportation. We also recommend that you avoid touching fish with your bare hands, as it could also be stressful to the fish. It should be noted that nets with extremely fine mesh, as in holes so tiny that you can’t easily see them, are much better to use.