QLD: Govt to put alarms on shark nets after whale caught BRISBANE, Oct 16 AAP - Acoustic alarms would be fitted to all shark nets along the Queensland coast after two humpback whales were trapped in the protective barriers today, a Department of Primary Industries (DPI) spokesman said. Both animals were freed but one of the whales, a calf, was stranded in shallow water for seven hours before being reunited with its mother off the Sunshine Coast north of Brisbane. Staff from Sea World on the Gold Coast and Underwater World on the Sunshine Coast worked all morning to free the animal and succeeded soon after midday. DPI fisheries resource protection general manager Dan Currey said the acoustic alarms, which had been used on nets in areas where whales were commonly seen, would now be fitted to all nets. "The alarms have been very successful and we believe that fitting these to all shark nets in Queensland will minimise the risk of this happening again," Mr Currey said. Both whales were swimming safely off shore about 7pm (AEST) and would be watched closely until they left the Sunshine Coast waters.