Mipukbay Green Aquarium Decor Castle, Resin Fish Tank Decoration Ornament for Freshwater/Saltwater, Safe Landscape Rock Cave Hideout for Betta Fish, Goldfish and Aquatic Pets Brown Castle is up for auction in Pet Supplies. The current bid is $8.50, 44% below the $15.19 MSRP, in Good Condition. This auction has ended — similar items appear in live auctions regularly.