Complex sentence: At the top of the GOT, visitors learn about the animals (sea turtles, sharks, barracuda, etc.) that live in this huge exhibit including how this exhibit's enormous tank was built and how the staff take care of the animals in the exhibit.
Split into simpler sentences: At the top of the Tank, visitors learn about the animals (sea turtles, sharks, barracuda, etc.) that live in this huge exhibit. Also explained is how this exhibit's enormous tank was built, and how the staff take care of the animals in the exhibit.