Best source on U.S. WWII submarine losses is probably Vernon Miller's series of articles in Warship Quarterly in the late 1980s. Basically, a submarine was sighted on Oct. 11, 1943 by a Japanese shore battery on Cape Soya in La Perouse Strait, which opened fire. The sub dived. It was soon sighted while submerged and attacked by aircraft craft and surface vessels. All told, 103 bombs and depth charges were dropped. An oil slick measuring 60 meters wide by 3 miles long was observed as a result of the attacks and debris was observed in the spray. Miller gives the location as 45° 13'N, 141° 56'E.
Is it Wahoo? Very probably yes -- as the link states of the photos: "They were taken on July 28 and 29, 2006, by a Russian team in a dive at the specific location whose coordinates were previously given to the Russian authorities by the Wahoo Project."
The wreck may look intact, but the thing to remember about submarines is that you don't have to blow a very big hole into one to sink it. Submarines have been sunk by diving with a hatch open, or having bothe ends of a torpedo tube open at the same time. Somewhere on the wreck, there will be a hole (or holes) from the depth charges and bombs. It's just not visible in the pictures on the web.
