The left one is "asking if it is alright to come out and play". I love the two with the mouths open, yawning. Like, "this is so boring". Nice pano of the hippos. It might be better if the one in the center had the bottom of the mouth full visible. A minor point however. Level and exposed properly, to me anyway.
Excellent moment captures, and it's great that you have 3 subjects, always better in odd numbers :)
Wish the line between water and land was not in the center, I sippose you have more of one or the other.
Lovely moment. I am sure it would be nice watching these fellas. I would have loved it more if the one on the left would have raised its head a bit more. The present version looks nice as well. Without the one on the left, it would have been difficult compositionally. I would have tried a vertical as well. Thanks for sharing.