It wouldn't.
It would die almost instantly.
It is impossible for life to survive on Neptune for the following reasons:
Well if Neptune had life, we would have to build a McDonald's or Burger King.
There is no oxygen on Neptune, so, no. In theory, you may be able to in a space suit, but still, physically, no, you can't breathe on Neptune. Neptune is too cold to support life and too cold for electronic equipment to operate properly (such as space suits). See the related question below.
Earth would either orbit Neptune or get torn apart by neptune's gravity
Yes. Neptune is extremely cold.
Neptune is very very cold a coat would not protect you enough.
no the atmosphere is to thick on Neptune to breathe
Well if Neptune had life, we would have to build a McDonald's or Burger King.
You would look like a corpse. Life cannot be supported on Neptune.
if we lived on neptune we would be blowen round because winds blow at 2000 miles per hour and it is very cold
your a big old stupid head!
they would have either a lot of fur or body fat because the temp. on Neptune can get up to be -373 degrees F
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The creature would be hobbit. They were shorter than dwarves and lived in the Shire.
you wouldhave to live in a cool house
For any creature to be able to breathe, there has to be something to breathe. Space is vacuum, an empty nothing. No creature can get anything from nothing. So no, a turtle wouldn't be able to breathe in space. Unless you provide it with an atmosphere, like in a space station, space ship or a space suit. Then a turtle most likely would breathe just fine.
its nearly impossible to live on Neptune since it's a gas giant but if you could you would probably need to fly and withstand very cold weather plus breathe with no oxygen
The question should not come up, because, from a human way of thinking, there is no "on" on Neptune. Neptune, as well as Uranus, Saturn and Jupiter, is a gas giant, which is more like a star than what we think of as a planet. The only solid material to stand on (if there is any) would be beneath an ocean of atmosphere so heavy it would crush any ship, device or suit we can imagine. We'll never try to land there (we can't even send robots - they too would be crushed), so we don't have to worry about how to breathe there.