Lucian M.
Google
You could probably visit the whole thing in 30 mins or less. It's basically a corridor crafted to in the liking of an underwater cave, while the floor is paved by white and black pebbles. The tanks are inside the walls, left and right. It might be less than 20 tanks inside. Most of the species are local, with only a few giant fish species. There's not much information about the fish, but they do say their names in English.
In the hallway, there's a tank you can touch different shells, a quiz game about aquatic life and a small exhibition of different shells and mollusks.
The price is fair, only 6.5€, and you get to refresh yourself in a cool spot for a bit.