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No, the Manatee and Platypus are not the same animal. They are not even related. Manatees are marine, placental mammals, found in temperate waters around the world. Platypuses are freshwater monotremes, or egg-laying mammals, endemic to Australia.
Diatoms can be found in oceans, freshwater, and also in soils on damp surfaces
the oceanic zone
freshwater,estuarine,and marine! -ash (:
Marine
I think marine aquariums are saltwater unlike freshwater that do not have saltwater
Yes :) they are most common in marine environments though
These protists are common worldwide in freshwater lakes and streams, only S. multiformis has been recorded from marine, freshwater and even terrestrial biotopes.
gain of water through food
It's a manatee
Ectoprocta, also known as bryozoans, is a phylum of strictly marine animals with no freshwater or terrestrial forms. These colonial filter-feeders build hard exoskeletons and are found in oceans worldwide.
marine turtles have flipperlike arms and don't come on land as often as freshwater turtles.