Queensland State Archives posted a photo:
Artwork by Frank Olsen.
Also known as the spotted fanfish, Pteraclis velifera is a species of pmfret found in the Indian and western Pacific oceans from South Africa to New Zealand. It is found at depths to 500 meters. It reaches a length of 50 centimeters. Metallic silver in colour, its dorsal and anal fins are blue-black with silver trimmings.
Information from FishBase and Wikipedia.
Queensland State Archives, Digital Image ID 6219