>Mussels open the shells and every now and then take in a small amount of water, filtering out everything that is suitable for eating. When the water is pollute

>Mussels open the shells and every now and then take in a small amount of water, filtering out everything that is suitable for eating. When the water is polluted, they do their best to separate from it, and everyone’s shells just close at the same time. This happens within two minutes. If two or three clams close, it doesn’t have to mean anything, but if there are eight, it’s an alarm. Then our role is to find out what has upset them so much and find out if it is a real or a false alarm – says Podolski.