NOTE: in the early 1960s USFA members met at 'the blood bank' in Sydney to make the standard donation ONE PINT OF BLOOD.
The thought of a shark bite being at any moment being on the mind of spearo's - and all swimmers.
Book 'Shark Attack' by W. Coppelson was a best seller which warned against swimming in quiet ocean waters on overcast summer days. Good info.
The Shark Menace (1955)