Whales are mammals and must breath air. If they cannot reach the surface to breath they will drown.
because they are mammals, the need air like us that's why they can't swim all the time.
because whales are mammals and mammals have lungs not gills.
swim.
no some swim upwards however they cant swim backwards but.. they do like to try. Whales have huge dongs.
they swim with their mouths open
To swim and to progress through water.
if ostriches cant swim, they wount be floating on top of water, which means ostritches can swim.
i think they might hide in a under water cave or maybe there is some coral they like to lay on or under it or a baby blue whales shelter can be its mother he can swim under her
because the japanese need something to eat
Swim and eat and play. Whales are air breathers who swim under water, so they need to surface sometimes to breathe. But some whales can dive to depths of thousands of feet, where there is no light, and they navigate and search for food by sonar rather than by sight.
because they use there tail to swim, and they don't have a tail on the front so they cant swim backwards.
ducks have to swim under water to get food because they will have no food if they dont go under water and they need water also.
by using their powerful tail to push them through the water
Whales swim using their fins and tails.