His subject was coral reefs, which are in trouble by many environmental problems.
The aim of the Oceanium, the big aquarium of the zoo, is to breed as much coral as possible without needing to catch live coral in the sea.
The Oceanium for this had to catch their original coral near Curacao in the Caribbean.
100% of the coral survived the cross Atlantic journey thanks to careful transport.
Less known than coral in tropical waters, but maybe even more numerous, is coral in deep colder waters.
Blijdorp already has cold water corals, and, as a first for any zoo, will show them to the public soon.
The zoo plans to bring part of their successfully bred new coral generations back to the oceans to help reefs recover.
Elkhorn coral is a beautiful species, limited to the Caribbean.
95% of its original numbers are gone.
It only breeds on a few days in the year, only in the evening, from 9:30 pm to 9:45 pm.
See also here.
Diversity Partitioning of Stony Corals Across Multiple Spatial Scales Around Zanzibar Island, Tanzania: here.
Coral larvae can’t settle in acidifying oceans: here.