There are multiple artists named "Sharks":
These are photos from concerts where Sharks played, so they may be of other bands that played the concert as well.
Roxy Music / Sharks Jun 2, 1974 New York, New York, United States Uploaded by Zimtrim
Roxy Music / Sharks May 30, 1974 Philadelphia, Pennsylvania, United States Uploaded by Zimtrim
Mountain / Sharks May 14, 1974 Meadville, Pennsylvania, United States Uploaded by Zimtrim
Mountain / Sharks Apr 19 - 20, 1974 Passaic, New Jersey, United States Uploaded by Zimtrim