The Hindsgavl Slot in the town of Middelfart has teamed up with Fishbrain, the world's most popular angling app, to offer its two million users a 35 percent discount for the rest of October.
The app is also rewarding the top three Fishbrain users who log catches with the hashtag #troutdk with merchandise.
On Monday, the trout were released when a cargo ship accidentally ripped through a fish farm net in the Little Belt, the strait between the Danish islands of Funen and the Jutland peninsular.
Conservationists fear the released trout might eat the eggs of the wild sea trout presently spawning.
Søren Knabe of the environmental group Vandpleje Fyn told The Local that it was urgent that as many of the trout were caught as possible.
“We only have a few weeks,” he said. “The risk is that the rainbow trouts will go to our streams and small rivers and start eating sea trout eggs when they start spawning at the start of November.”
He said that fishermen were already flocking to the west coast of Funen from Germany, Norway and even England.
“There are a lot of people out right now actually, and four or five days ago they started catching all these trout. A few of my friends have caught some, so I know they're out there.”
Last year Fishbrain partnered with the US Fish and Wildlife Service (www.fws.gov), to crowdsource data relating to endangered species around the country.
Johan Attby, Fishbrain CEO, said: “We are partnering with this hotel as a call to arms to anglers across the world, but especially in the US. This tragic event threatens the existence of certain species in the area, and extra action must be taken to make sure the Rainbow Trout do not harm local biodiversity. Hindsgavl Slot understands the severity of the situation, and is very kindly encouraging anglers from across the world to come and help.”
Lisbeth Vinther-Wilhelmsen, Reception and Conference Manager at Hindsgavl Slot said she was looking forward to anglers arriving to take advantage of the offer.
“We are looking forward to welcoming American anglers to our beautiful area,” she said.