Pretty accurate physics of you ask me

There are lakes of water at the bottom of the ocean more salty than the surrounding water

nah u got it

Fish can drown in a special type of mega salty water

Aka the tears of the 90 killstreak trolldier after a sniper bot kills him

Explanation for some of them:
1, half of 2, 5 and 6: brine; water that has a higher salinity than the seawater around it
the other half of 2: Oil
3: the water isnt salty enough to fill the pool
4: Adoption
8: not built for surface travel
7, 9, 10, and 11: Cartoon physics