Three Crabs ... in looking at the chart there a couple there ...
According to Great Lakes Shipwreck Research (yes, that is a real website which you can find
here) it probably is the wooden schooner Ottawa. The story goes back to 03 September 1875. I am plagiarizing below - so my apologies to the author.
"Along with several other schooners, she (the Ottawa) was caught in a storm near Lexington, Mich, and disabled. The propeller GEORGE KING towed her into the St. Clair River, where she anchored for the night. After dark the propeller ANNIE L. CRAIG collided with her, putting a hole in her side. She drifted to the Canadian side and sank. In mid-October she was stripped, towed "into the bulrushes of Sarnia Bay," and abandoned. Still lying on the bottom in Apr, 1878, she was later raised, but was declared a constructive total loss and abandoned (probably)."
I assume the second ship that's there is the Southampton -- going by the story on the website, but that's just guessing on my part. You can read details
here.
Hope this helps (and if not, at least entertains!)
Scott.