The crocodiles who call the murky depths of north Queensland's Proserpine River home harbour myriad secrets.
The larger-than-average crocs are considered an anomaly, with more large crocodiles per kilometre than any other system in Queensland.
But despite their territorial nature, researchers are baffled at the relative lack of scars and scratches on the reptiles, which they say is usually standard in high-density areas due to fights.
