The Rockhampton crocodile murderer is still at large two months after the victim's 5.2-metre body was discovered.

The male reptile was found on September 21 in the Fitzroy River at Etna Creek, about 20 kilometres north of Rockhampton, with a bullet lodged in its head.

Police are still investigating after a 5.2-metre crocodile was found shot dead near Rockhampton. Credit:Department of Environment and Heritage Protection

"Investigations into this matter are ongoing and police are appealing for anyone with further information to come forward," a Queensland Police Service spokesman said in a statement.

People for the Ethical Treatment of Animals Australia offered up to $5000 as a reward for information leading to the identification and conviction of the person or people responsible soon after the carcass was recovered. However, that is yet to be claimed.