S.W.

—S.W. (Father) appeals from the juvenile court’s findings at the six-month review hearing that reasonable reunification services were provided to him and that active efforts were made to prevent the breakup of the Indian family. We reverse and remand.

BACKGROUND

In May 2015, the Mendocino County Department of Social Services (the Department) filed a Welfare and Institutions Code section 300 1 petition with respect to T.W.-l, T.W.-2, and T.W.-3 (collectively, Minors). The petition alleged Minors’ mother, K.W. (Mother), had substance abuse and mental health issues rendering her unable to care for Minors, and that Father’s whereabouts were unknown. 2 The detention report stated Mother and Minors were enrolled members of the Hopland Band of Porno Indians (the Tribe). At *342 the detention hearing, Mother informed the court that Father was Minors’ father, she and Father married in 1997, and they were still married although Mother had filed for divorce in 2009. The last she had heard about Father’s whereabouts was that he was incarcerated in Florida. T.W.-l, who was present at the hearing, told the juvenile court she would like to have contact with Father if the Department…