Well certain sharks like calm & Certain like Rough.
You can only use Surf on calm water its not possible to surf on rough water.
The river is over 4,000 miles long and overall it can be calm to rough in various parts.
Yesterday? It was rough.
stressed, rough
without rough motion; without rough motion
As in all seas, everything from rough to calm
stressed, rough
Yes it does but drinking water works a lot better.
we can see our reflection in calm lake because the water is not moving and in sea the water is moving very fastly
That depends on the houseboat itself and the weather. Because of the flat bottom most houseboat can't handel rough water. Some do marginally better than others (Gibsons are know to be able to handle a calm sea).
very blue and calm but sometimes a bit rough
Nurse sharks usually never attack humans they are very calm.