This vibrant 4-stamp semi-postal set was issued by Belgium to commemorate the 125th anniversary of the Antwerp Zoo. Each stamp features a beautifully illustrated tropical fish species, reflecting the zoo’s marine life exhibits. The designs are colorful, detailed, and scientifically captioned with Latin names—making them highly desirable among thematic collectors of zoology, marine life, and aquarium species. Being semi-postal issues (e.g., 10F+5F, 6F+3F, etc.), they include a surcharge typically supporting charitable or cultural causes. The combination of marine biodiversity, anniversary commemoration, and attractive artwork makes this a strong mid-20th-century Belgian thematic set.
Featured Species:

• Chaetodon lunula (Raccoon Butterflyfish)

• Pomacanthodes chrysurus (Angelfish)

• Pterois volitans (Lionfish)

• Balistapus undulatus (Orange-lined Triggerfish)