RedactedNarrative: OPERATOR STATED THAT WHILE AT ANCHOR AND FISHING APPROXIAMTELY 1 MILE SOUTH OF CLEARWATER PASS A WAKE OR WAVE FROM SWAMPED THE VESSEL BY OVERTAKING THE STERN. THE BILGE PUMP WAS RUNNING HOWEVER A SECOND WAVE SWAMPED THE VESSEL AND THE VESSEL BEGAN TO SINK. ATTEMPTS TO START THE MOTOR WERE UNSUCCESSFUL.  SENT OUT A MAYDAY CALL ON VHF CH 16 BEFORE THE VESSEL CAPSIZED.  NO INJURIES WERE REPORTED.