The number of seals trapped in fishing nets and other debris reported in the Netherlands has multiplied by eleven in the past decade, rising from 7 cases in 2014 to 77 in 2024.
The reason for this sharp increase is unclear, but conservationists warn about the dangers of marine debris for curious young seals.
Most of the trapped seals are young grey seals, Emmy Venema, stranding coordinator at the Pieterburen Seal Center, told NU.nl.
Growing problem with marine debris
Entanglement of young seals becomes life-threatening over time as the animal grows, causing the debris to tighten around their necks. Venema explained that this could lead to serious injury or death.
She emphasizes that the rise in reports indicates a growing problem with debris in the oceans. Heavy storms displace fishing gear and spread waste.
The seal population in the Netherlands has grown to over 18,000, with grey seals making up a significant part of the population. Despite the increase in entanglement reports, marine researcher Sophie Brasseur of Wageningen University downplayed the concern. “The numbers are relatively low compared to the population,” she said.
Human actions and prevention
Only a small number of entangled seals are rescued and treated, as conservationists prefer to minimize stress for the animals and let nature take its course.
While some suggest using nets that break more easily to reduce entanglements, this is unlikely due to fishing industry priorities, Venema said.
In addition to nets, everyday items such as plastic bags, potato sacks, and other discarded objects are also to blame. Venema urged people to dispose of waste responsibly to help prevent more seals from becoming trapped.
