Brackish water

So, imagine you have two cups of water - one with salt (like the ocean) and one without salt (like the water in your bathtub).

Now, imagine you pour a little bit of the salt water into the fresh water cup. What do you think happens?

Well, now you have a cup of water that is a little bit salty and a little bit fresh. This is called brackish water!

Brackish water is a mixture of salt water and fresh water that happens when the two types of water come together, like when a river meets the ocean or when there's a lot of rain and the runoff from land mixes with the ocean.

Brackish water can be found in things like estuaries, which are where rivers flow into the ocean. There are also some fish and plants that can live in brackish water, like crabs and certain types of seaweed.

But if you're thirsty and need a drink of water, brackish water is not a good choice – it's not quite salty like the ocean, but it's also not quite clean like fresh water. So it's best to stick with fresh water that hasn't been mixed with salty ocean water.