go into water v. go into the water

[hhtt21]

"Movies and books have made it seem like there is a big shark waiting to bite every swimmer that goes into the water."

How can we determine whether or not it should be "go into water" or "go into the water" ?

Source:Zoobooks Sharks

Thank you.

 

[GoesStation]

The definite article is required if you don't qualify water with an adjective.

 

[hhtt21]

The definite article is required if you don't qualify water with an adjective.

But there is an counter example in the same source. "As water grows warmer, some sharks migrate north." In this sentence there is neither any article nor any adjective.

Thank you.

 

[teechar]

But there is an [STRIKE]counter[/STRIKE] example to the contrary in the same source. "As water grows warmer, some sharks migrate north." In this sentence there is neither any article nor any adjective.
Thank you.

This is different. This is talking about water (in general) as a liquid.
For example,

As water boils, it evaporates into the air.
As water stagnates, it becomes darker.

In the original, "the water" means the water bodies where sharks may be encountered.