#      Family     Count
 other_tracer         0
debris_tracer         0
 cloud_tracer         0
  star_tracer         0
 other_tracer         0
   gas_tracer         0
           DM  29184828
         star     34533
        cloud         0
       debris         0
        other         0
    undefined         0
 Particle fields
pos vel mass iord level family tag tform metal