An investigation has found a fish kill at Ocean Beach near Prawn Rock channel was likely caused by adverse environmental conditions. The Department of Primary Industries and Regional Development investigation concluded last week stated up to 40 silver bream would have become stressed then died because of low dissolved oxygen levels. The findings from DPIRD indicated it may have been because of low water levels, high water temperatures and the inlet mouth being mainly closed. The kill was reported on December 28. Denmark man John Standing told the Advertiser a large school of bream had been trapped in the channel as late as December 27 because at high tide a very shallow channel would link it to the ocean. Mr Standing also noted that a number of fish were confined to smaller pools “midway across the sandbar” from which they had been “herded out and grabbed by tourists”. A large school trapped at the end of the channel was reportedly “like shooting salmon in a barrel” for the large group of visitors to ”throw a line at”.