The zona (Bedotia madagascariensis) is successfully bred at Cologne Zoo. | Photo: zoos.media 8. March 20238. March 2023 conservation, history, media-echo « back 50 Years Cologne Zoo Aquarium: Our Contribution to the Conservation Zoo Published in the year 2022. | By: Prof. Dr. Thomas Ziegler Over the course of five decades, Cologne Zoo‘s Aquarium has made significant contributions to conservation and continues to further develop this work. » to the full report Share this post