The longfin escolar, Scombrolabrax heterolepis, also known as the black mackerel, is a widespread but uncommon deep sea fish that presents some difficulties for taxonomy. It is placed in its own family Scombrolabracidae, but the family's placement in the suborders of Perciformes has included Scombroidei, Percoidei, and Trichiuiroidei, while some authors place it in its own suborder Scombrolabracoidei.