Masked Swallowtail Angelfish - Female - PhilippinesGenicanthus semifasciatus Masked Swallowtail Angelfish are renowned for their peaceful nature and compatibility with reef environments. However, male specimens may become territorial towards other males, so it's best to house several females with a single male in an aquarium. These Angels have cheek spines along the edge of their gill covers, so handle with care and avoid using nets, as they could become entangled and injured. Both male and female