(CNN) Donald Trump Jr. has been condemned by animal rights organizations for promising to take an auction winner on a seven-day hunting trip to Alaska, in a sale organized by a trophy hunting group.

The yacht-based expedition will see Trump Jr., his son and the auction winner kill black-tailed deer and sea ducks, according to the auction site.

Bidding for the trip had surpassed $10,000 at the time of writing. The auction, hosted by Safari Club International (SCI), also includes trips to kill buffalo in Zimbabwe and to shoot an elephant in Namibia.

The expedition is set to take place in November -- the same month that Trump's father will seek reelection.

"This year we will be featuring Donald Trump Jr., a man who needs no introduction, and who's [sic] passion for the outdoors makes him the number one ambassador for our way of life," the listing reads.