Due to having a large flotation sack on the front of their chest, they can surf for days on end without sinking, even when they're too tired to move any further. When they spot a lost ship, they will guide it to land.
The flotation sack on their chest is not only used for surfing on the waves, but is also used to prevent injuries when crashing into the ground. Since they hone the natural abilities of flying and swimming, they make perfect partners at sea.
In addition to its sea-farring body, it boasts an "internal compass", somehow always knowing the right direction to land.