Wildlife officials are investigating a "disgraceful act" of animal cruelty after a crocodile was found dead in the Ross River mangroves.
The crocodile was found near the Barnacle Street boat ramp in Townsville on August 15 and is believed to have suffered a "slow, agonising death".
A poaching contraption made from a four-metre wired rope, hook and stone was found hanging from its mouth.
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"When wildlife officers attended the scene, they discovered the 2.6m crocodile entangled in the mangroves," DES Senior Wildlife Officer, Tony Frisby said.
"Disturbingly, wildlife officers found a large hook attached to the wired rope, and they believe the hook was baited in a deliberate attempt to target and kill the crocodile."
"This is a disgraceful act."
Wildlife officers are sweeping the area for similar baits and lures, which resemble the equipment used by poachers.
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Crocodiles are a protected species in Queensland under the 1992 Nature Conservation Act.
The maximum fine for the deliberate killing of a crocodile is $32,243.
Anyone with any information has been urged to come forward.