11 attacks recorded (0 fatal)
| Date | Country | Region | Location | Fatal? | |
|---|---|---|---|---|---|
| Jun 4th 1931 | USA | Florida | Key West | N | |
| Jun 13th 1931 | USA | Hawaii | Pearl Harbor, O'ahu | N | |
| Jun 14th 1931 | USA | Hawaii | Pearl Harbor, O'ahu | N | |
| Jul 15th 1931 | USA | New Jersey | Sea Girt | N | |
| Aug 6th 1931 | USA | New Jersey | Sandy Hook (ocean side) | N | |
| Aug 18th 1931 | USA | Texas | Off Brownsville | N | |
| Aug 27th 1931 | USA | New Jersey | 1 mile ESE of Navesink | N | |
| Aug 30th 1931 | USA | Hawaii | N | ||
| Sep 2nd 1931 | USA | Hawaii | Kahala, O'ahu | N | |
| Sep 21st 1931 | USA | Florida | Municipal Beach, West Palm Beach, Palm Beach County | N | |
| Sep 21st 1931 | USA | Florida | Municipal Beach, West Palm Beach, Palm Beach County | N |