Gebr. Kooy imports fish from all over the world, but most of the fish is bought fresh on Dutch fish auctions. A lot can be purchased online, however Gebr. Kooy usually opts for being present at the fish auction to check the quality of the fish and therefore ensure the best quality for the lowest price. Many customers also employ Gebr. Kooy as a commission agent to purchase fish for them. This fish is then also often delivered by refrigerated transport by Gebr. Kooy itself.