The Flemish Institute for the Sea (VLIZ) maakt onlangs confessed A year ago these were two specimens that could be found in the world of the Westerschelde. There is also more to discover in the Dutch Noordzee. Participants spoke of an “optimistic view” at the door that required a large amount of protective measures and represented an efficient hunter at a distance of up to 70 kilometers per hour. The sound can be 20 to 30 years old and travel up to a kilometer back.