All marine reptiles must occasionally surface in order to breathe. Aquatic creatures in our game are no exception, and must occasionally breathe in order to survive. They hold no purpose for drinking water given their lives are indeed lived in water. This left a hole in the mechanics that water and thirst provided towards other creatures. Air fills the gap on the UI for aquatic creatures, occupying the blue sphere. It grants many of the same benefits or drawbacks a well-hydrated or dehydrated terrestrial creature would receive. These benefits and drawbacks are shown below:
- Having high oxygen will improve the rate at which a creature recovers lost HP. A state of running out of breath will cause a creature's HP to decay over time rather than heal.
- Keeping oxygen high will increase the rate at which a player's stamina recharges by 15%, whereas being at or near a state of dehydration will cause a player's stamina to recharge 15% slower.
- Keeping oxygen high increases the rate at which a player's ability power recharges by 15%, whereas being at or near a state of dehydration will cause a player's ability power to recharge 15% slower.
Without any other action, an aquatic creature can last a significant amount of time under the water without taking a breath. The rate at which they exhaust their air supply is very small while stationary, lasting an hour before they begin to die due to lack of oxygen. Actively sprinting consumes oxygen, but only a small amount. A player can sprint for a long time without worrying about air, only surfacing occasionally. Using your bite attack consumes moderate oxygen. Use of any ability that consumes significant ability power such as grabbing will consume lots of oxygen. Combat consumes significant oxygen, likely causing creatures to need a breath in the midst. The Elasmosaurus does not consume additional oxygen to use its bite, but the Mosasaurus does.
In order to refill on air, one must surface and then press the use keybind in order to take a breath. Taking a breath immediately grants 15 air, and then continuously grants 15 more air each second until the player dips below the surface.