Looks like a juvenile Nassau Grouper and juvenile QLD grouper to me
I'm not sure of their status in your country. Both look like very nice specimens. Grouper are very outgoing fish. The QLD grouper grows to enormous size, Im not sure why they have one. But then they also appear to have a little black tip reef shark
Wow! Your amazing, those are totally what they are! And yes, that is a black tip reef shark(you need a permit to have one, and it's very hard to get a permit). I felt bad for the black tip reef shark, sharks need to be kept in aquariums with rounded sides. This one didn't seem to be hitting his face and his skin wasn't raw at all though.
I'm amazed by how big the QLD grouper gets. That one really is just a baby! I hope they have a plan for that fish, maybe the Monterrey bay aquarium will take him in when he gets to big, or the academy of sciences. Both places are less then 2 hours away(one north one south)
I love this store for the amazing variety of fish they carry, from small neons to octopus. They also had another display tank almost as big as the one in the video with a bunch of freshwater fish, including a beautiful arowana, medium sized red tailed cat(they get huge), giant plecos, and various large fish. I've only ever bought a copper HM female betta. They used to carry a ton of dyed fish, and although they carry much less I don't like it. Plus they have bad costumer survive. I joke with my friends that the only reason I bring in Rosie is to get there attention to ask questions lol.
I looked through my friends deviant art to see if she had photos of the big freshwater aquarium, but I only found this one featuring a gold pleco, it was massive and over 2'. In the back ground is a even bigger fish.
And here's a few photos from yelp
Some of the marine tanks
freshwater tanks
They always have great live plants(pics from there facebook)
I found a photo of the QLD grouper, they confirm it in a comment that it is a Bumblebee grouper. that must be a common aquarium name because when I googled bumblebee grouper most of the photos where of young fish in aquariums

Here's the grouper when it was younger. That is a really beuatiful fish, I can see why someone would be tempted to buy one. At least they only had the one and none for sale.
They have a great pond set up, last time I was there though they had to take it down because of a leak for repairs. They usually have it deeper.