Lamarck's Angelfish Genicanthus lamarck

Lamarck's Angelfish female
Lamarck's Angelfish
Lamarck's Angelfish, also unhelpfully called the Blackstriped Angelfish, is native to reefs of the western Pacific from Thailand to Japan and the Great Barrier Reef.
Lamarck's Angelfish
Lamarck's Angelfish
Lamarck's Angelfish
The female is shown above. The male has doesn't have the bold black upper stripe but only thin black lateral stripes on the flank and no black border to the spotted tail, but he develops a swallowtail. Adult length is 25cm. All juveniles are female.
Lamarck's Angelfish A part of a male Lamarck's caught in the photo of another fish - showing the flank and the swallowtail.