The Indo-pacific Humpbacked Dolphin inhabits the Inian Ocean and south-west pacific and is also found in the Yangtze River.
by eating animals that contain freshwater
Yes it can survive in freshwater.
When a bottle nose dolphin is preyed, it bashes its hard nose on the predator.
It would depend on the nature of the environment. Platypuses are specially adapted to live in freshwater creeks and rivers within bushland or rainforest. As long as they had access to clear, freshwater rivers and creeks where they could feed and dig their burrows, and some tree shelter overhead, they could (arguably) survive.
penguins don't breathe water, so yeah, as long as the environment fits there needs and food supply is met.
the blowhole
There are freshwater trout. For them it's no problem.
it need oxygento survive
No.
that they have no problem to survive
no, as brine shrimp are saltwater animals and will not survive in freshwater.
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