Rovers completed the signing of the 23-year-old forward on a two-and-a-half year contract following his switch from Shrewsbury Town.
And while boss Moore believes Okenabirhie has plenty of facets to his game, it was his goalscoring ability that proved a major attraction.
“We felt it was good to bring Fej here because we felt we needed someone in that department and he possesses all the attributes that we really want,” Moore said.
“He’s a wonderful player, a clever player, he’s smooth.
“He can link play, he can cause opposition teams problems by going in behind.
“And obviously he can score goals which we felt was important to try to bring someone of that stature into the club.
“We’re delighted to have him here, it’s brilliant he’s here and it’s another good acquisition for the squad.
Okenabirhie was Shrewsbury’s top scorer last season with 16 goals, including the one which secured League One survival on the final day of the season.
While he found himself on the fringes this term, Moore is confident Okenabirhie will show his quality given the chance at Rovers.
“When he gets in front of goal his finishing shows that he’s composed, he’s clean with his finishes and he’s got direction to his play,” Moore said.
“We’re really pleased to have Fej on board and we’ll quickly get down to work on the training ground with him.”