Survival skills
A human being can survive an average of three to five days without the intake of water. The issues presented by the need for water dictate that unnecessary water loss by perspiration be avoided in survival situations. The need for water increases with exercise.
Byrrah
He can survive only for 10 minutes out of water, unless he uses a special serum that gives him the ability to breathe air. His stamina, agility, and reflexes are reduced when out of the water.