Same temperature as white labs, or all labs for that matter. General rule - If its too cold for you its too cold for your dog
It really depends on what kind of a swimmer you are. If you can swim really well, you can probably swim really far. If you can't swim at all, you won't swim very far. I hope this answers your question.
As far as a blue whale can swim in a year
they swim as long as they can
why do ducks swim together in lines
a pigeon cannot swim very far it can swim approximately 20m for approximately 30 seconds (I think) :)
In general, yes, black labs LOVE to swim. However, just like people, different dogs have different personalities, so it really varies dog to dog. (For instance, my black lab is terrified of the hose, will walk around in water, but hates to swim.)
they swim deeply and far away.
Yes, it helps them swim in water. Labradors also have webbed feet.
not far from its normal habitat
as far as a elephant can run
A swimmer must swim 75m.