Agree. I also believe initial plans may well have have included orca. For the benefit of anyone joining this thread now; The initial and larger plans had involved the creation of an artificial island in the shape of an orca containing a Seaworld, Aquatica, Busch Gardens and Discovery cove at The Palm Jebel Ali, Dubai. Busch's Worlds of Discovery coming to Dubai
The African Manatee went to the National Aquarium of Abu Dhabi not SeaWorld Abu Dhabi. They are two different facilities but both aquariums located in the area. Regardless the park still has quite the collection!
My apologies you are quite right, i saw a snippet of news on social media that said "Seaworld" and a quick google has failed me. An amazing density of massive aquariums!