The dolphins were found by recreational fishermen on May 23 in the upper reaches of Two Mile Creek near Toolakea Beach, north of Townsville, Australia.
Authorities believe the dolphins were caught accidentally during netting.
Great Barrier Reef Marine Park Authority Field Management Director Mick Bishop said this type of behaviour was totally unacceptable and was being investigated.
“Given the circumstances, the death of these animals is of concern and we urge anyone with information relating to this incident to come forward,” he said.
“Their deaths should have been reported.
“Instead, there has been a clear attempt to conceal the bodies of these dolphins.”
“Snub-fin dolphins inhabit the inshore waters of northern Australia and they face a number of threats, particularly from coastal development, habitat loss and illegal netting,” Mr Bishop said.
Source: Townsville Bulletin