Orange-lined Triggerfish (Balistabus undulatus)

The scientific event recorded by the definitive issue is the formal registry of the region's diverse marine life, textually classified under the general category "Baliste". This installment of the late 1950s marine fauna collection registers the complex reef-dwelling species native to the hyper-saline coastal waters of French Somaliland. Historically, the publication of this biological survey served a vital administrative role, highlighting the environmental complexity of the coastline and establishing a formal record of East African marine ecology for the global Universal Postal Union.