This data set contains observations of dead seals made by the public, mostly around the Swedish coast. Each observation is verified at the Swedish Museum of Natural History before it is approved and published on the web. The verification consists of controlling the accuracy of coordinates and taxonomic determination. If the specimen is considered valuable to collect for autopsy, then observers may be contacted by the National Museum of Natural History or the Swedish Veterinary Agency (SVA) in Uppsala to obtain more information about the findings.