A first-half scoring blitz was enough for the Sharks to hold on for a 24-18 NRL victory over North Queensland at Dairy Farmers Stadium.

The Sharks set up the victory with a blistering four tries in the opening stanza, capitalising on some sloppy Cowboys defence.

Backing up from last night's Test, Cronulla's bruise brothers Greg Bird and Paul Gallen were superb, with Gallen grabbing a try and Bird setting up his side's first.

Gallen, Fraser Anderson, Luke Douglas and Brett Kearney all crossed for the Sharks before the break while Luke Covell slotted four from five for the night.

While the victory consolidated Cronulla's position in the top four, North Queensland remain second last on the ladder following their sixth loss from nine matches in 2008.

And the Cowboys' season continues to go from bad to worse, with their Australian representatives struggling to back up after last night's Test in Sydney.

Carl Webb committed three handling errors while halfback Johnathan Thurston was below his energetic best in the Cowboys' third straight defeat.

They were not the only ones to blame, with the whole side guilty of lacking intensity in the first half.

The second half deteriorated into a mistake-riddled affair with both sides losing possession and testing the patience of referee Tony Archer in the ruck before the home side sparked a mini-revival.

The Cowboys rallied late in the second half through tries to Webb and Luke O'Donnell but it was too little too late with Cronulla winning their third straight against the Cowboys.

North Queensland's depth is set to be further tested with five-eighth Travis Burns suffering a shoulder injury in the 44th minute.

Sharks captain Paul Gallen was pleased to get back to club duties after tasting success with Australia against New Zealand.

"I struggled a bit tonight," he said.

"I blew out after about 10-12 minutes in the second half but it was great to come up here and get a win.

"I am really happy for the boys. I have been away from them all week. It was great to see how professional they were."

Gallen believed the victory tonight would ease the pressure after some tight loses in recent weeks.

"The win puts us back on track. We lost two games we could quite easily could have won, so it is good to get one back," he said.

North Queensland coach Graham Murray said a poor first half cost his side any chance of victory.

"We were happy about our second half but the cruel part of it was our first half boarded on pretty ordinary," Murray said.

"I was pretty scathing of the first-half handling. The players know it and we know it as a team.

"We just weren't in the shooting match at halftime at 22-6. We are giving teams too many points in the first half."

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