Minor updates, based on recent YouTube videos of the aquarium:
1. The wallago catfish has been phased out.
2. There's also some animals that have been added, such as an Amboina box turtle and three arothon pufferfish (Immaculatus, manilensis, and reticularis)
3. The last scalloped hammerhead shark on display in the aquarium has been phased out, we wouldn't be seeing other hammerhead sharks anytime soon
4. Despite having multiple aquariums, the jellyfish zone only have moon and upside-down jellyfish, althought varying in size, which make it a little bit interesting
5. SeaWorld's nudibranch is short lived, the seahorse has returned to its exhibit
Since 2019, SeaWorld's collection in my opinion decreased in quality. There's not really much interesting species aside from 5-6 animals. I understand why SeaWorld seems to not be interested in getting good species. In 2017, they acquire the Japanese spider crabs, but the visitors was said to be more interested with the sharks and rays, making the crabs unpopular. Judging by that, SeaWorld seems to acquire the more popular and more well known species, the ones you've seen in films and in animal YouTube channels, so I can't blame them and the visitors too.
But in the end, what I love about SeaWorld is the exhibits, especially the "cave zone", the one with the titan triggerfish and pineapplefish, and the sharkquarium. But please phased out the sea turtle touch pool, which is definetaly the awful part of SeaWorld. You can still replace it with some freshwater turtles, which the neighbouring Ocean Dream had done.