Geography Question - Bodies of Water #4?

AviatorTom
Geography Question - Bodies of Water #4?

Here is the next in a new series of Geography questions... with a different category each day.

Monday - Bodies of Water
Tuesday - Buildings and Structures
Wednesday - Mountains
Thursday - Where Did It Happen?
Friday - Bridges
Saturday & Sunday - Random category

Today's category is Bodies of Water.

Can you name this Body of Water? Bonus if you can guess the large body of water it connects with.

Here are your clues:
* This body of water lies between two Scandinavian countries
* It is an arm of another large body of water
* It is salty at one end and not very salty at the other end
* It is 725 km (450 mi) long, 80–240 km (50-150 mi) wide and has an average depth of 60 m (200 ft)
* Several rivers flow into this body of water

Please don't cheat by looking it up or seeing what others are posting.

Make your guess in the opinions below.

The correct answer will be given in a few days (Wednesday).

Good luck!

Updates
1 y
The correct answer is GULF OF BOTHNIA, which is the northernmost arm of the Baltic Sea, and lies between Sweden on the west and Finland on the east
Geography Question - Bodies of Water #4?
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