Not all dogs are natural swimmers, apparently. Some breeds take to the water like a duck to... erm, you get the picture; others either can't (pugs have a hard time since they fatigue easily) while still others could swim if they weren't so terrified of water.
Here's a Great Dane who definitely seems terrified of the water as his trainer tries to coax him into the pool initially. The first time he goes in, you almost expect a cry for help as he splashes about.
However, over time, just like we all do, he starts swimming comfortably and even looks like he's enjoying himself!
Watch this video above.