Is an ortholog of human LATS1 (large tumor suppressor kinase 1). Exhibits RNA polymerase II transcription coactivator binding activity and protein kinase activity. Is involved in several processes, including apical protein localization\; defecation\; and digestive tract development. Localizes to the apical plasma membrane and cytoplasm. Is expressed in several tissues, including the alimentary system\; the epithelial system\; the excretory canal\; the reproductive system\; and the tail.