To find the vertical distance between Kale and the family of dolphins, we can subtract the depth of the dolphins from Kale's depth.
Kale is at -647 feet (below sea level) and the dolphins are at -112 feet (also below sea level).
The difference is calculated as follows:
\[ \text{Vertical distance} = | -647 - (-112) | = | -647 + 112 | = | -535 | = 535 \text{ feet} \]
So, the vertical distance between Kale and the family of dolphins is 535 feet.