no its not underwater viewing. just a small pool for the pigs to run into and cool off or rest. when the pigs are in the pool, it just goes up to there ankles.
I thought the pool might be only part-filled in this photo.
The obvious question is why on earth would a zoo build a display window in an enclosure for a non-aquatic species, and then stick a pool in front of it which appears to take up most of the land area? And is this enclosure really as small as it appears to be?