Around 7,000 Cape fur seals have been found dead in central Namibia, scientists of the charity Ocean Conservation Namibia said on Saturday, reported AFP.
Conservationists started noticing dead seals at the sandy beaches of the Pelican Point colony near Walvis Bay city in September.
After that, they found a large number of dead seal foetuses within the first two weeks of October, which gave them an estimation that between 5,000 and 7,000 female seals had miscarried young with more still being found.
The cause of their death is yet to be established, however, scientists presume anything from pollutants or bacterial infection to malnutrition. They are collecting samples for testing.
Annely Haiphene, executive director in the Ministry of Fisheries and Marine resources, suspected the seals died from "lack of food" but will wait for the results.
Notably, fur seals typically give birth between mid-November and mid-December.
In 1994, nearly 10,000 seals died and 15,000 foetuses were aborted due to starvation from the shortage of fish as well as from a bacterial infection at another breeding colony.