Tanguay, who is also playing a significant role with the Avalanche, was teammates with Cammalleri on the Calgary Flames for two seasons (2011-12, 2012-13) so he knows him well.
Cammalleri, who signed a five-year contract with the Devils worth a reported $25 million on July 1, has 11 points and a team-leading seven goals despite missing six games due to injury this season.
"He's got a great mind for the game and he has a great stick and he's always dangerous around the net," Tanguay said. "He's not the guy who will dominate the game but he's a guy that when he's around the net or in the opposing zone is always well placed. He's got a knack for scoring goals and he understands the game very well so I'm not surprised at all by how well he's played in Jersey."