In the Wet collections, specimens from all animal groups are stored in a mixture of 70% alcohol and 30% water. This protects them from decay. They thus remain available for scientific research. Each specimen has a label, on which all important information relating to the object in question is recorded. Without their labels, the specimen would be scientifically worthless. In the Wet Collection one million specimens are stored in 233.000 jars, taking up12.6 km of shelf space on three levels.