Racing Post have reported the colt is at Newmarket Equine Hospital and will not
race again."He is injured and we have taken the decision to retire him and will start looking for a suitable home for him as a stallion," said Niko Lafrentz, husband of the owner Heike Bischoff.
"He is in Newmarket's Equine Hospital and my wife is over there with him. We won't have a complete diagnosis for a while, but it is clear that he will not be able to run again."
Sea the Moon won his only start at two and has been brilliant this year winning his first three runs back before going down in the Group I Grosser Preis Von Baden to Ivanhowe.
From the first crop of foals by champion racehorse Sea the Stars, Sea the Moon was offered at the 2012 Tattersalls October Yearling Sale, but bought back by his breeders at 230,000 guineas.
He has a big pedigree being from unraced Monsun mare Sanwa, an unraced sister to German Derby winners Schiaparelli and Samum as well as German Oaks winner Salve Regina.
