<p>Being an <a href="https://en.wikipedia.org/wiki/Ice_giant" rel="nofollow noreferrer">ice giant</a>, there is no water on the surface of <a href="https://en.wikipedia.org/wiki/Neptune" rel="nofollow noreferrer">Neptune</a>. Having a surface temperature of <span class="math-container">$-201$</span> <span class="math-container">$^oC$</span> any water on Neptune will be frozen. <a href="https://en.wikipedia.org/wiki/Extraterrestrial_liquid_water" rel="nofollow noreferrer">Extraterrestrial liquid water</a> is believed to be beneath the ice surfaces of the Jovian moons <a href="https://en.wikipedia.org/wiki/Europa_(moon)" rel="nofollow noreferrer">Europa</a> and <a href="https://en.wikipedia.org/wiki/Ganymede_(moon)" rel="nofollow noreferrer">Ganymede</a>. A sub surface ocean has been confirmed on the Saturnine moon <a href="https://en.wikipedia.org/wiki/Enceladus" rel="nofollow noreferrer">Enceladus</a>. </p>

<p>As to whether fish or any other aquatic creatures could survive on watery celestial bodies would depend on the temperature of the water and the availability of nutrients and energy sources (sunlight, geothermal heat, etc.) capable of supporting them. This information is not available to us yet.</p>

CC BY-SA 4.0
2019-10-12T06:21:15.760Z
In particular the OP statement "Water has oxygen" is not correct. The oxygen atom in water is bound to the hydrogen atoms, and can't be used for breathing. It is likely that there is very little dissolved molecular oxygen in any of the sub-surface oceans
James K
CC BY-SA 4.0
2019-10-13T16:53:19.020Z
Thank you for answering.
draw134
CC BY-SA 4.0
2019-10-13T21:36:48.640Z
Neptune's "surface" temperature is defined as the temperature at which Neptune's atmosphere has a pressure of one bar (100 kiloPascal), or just a tiny bit less than the pressure at sea level on Earth. There is no "surface" at that shallow level in Neptune's atmosphere. Neptune's atmosphere remains a gas much further down than that. It's not known whether Neptune has a true surface at all.
David Hammen
CC BY-SA 4.0
2019-10-12T04:55:42.843Z
2019-10-12T04:55:42.843Z
Fred
<p>I'm a bit curious since Neptune does not have a land surface and it is covered with water, I mean water has oxygen right? What will happen if we put some sea creatures in these watery planets? Can they survive or live? I'm not referring to Neptune alone, I mean all the planets that has some large amount of water in it. Thanks.</p>

CC BY-SA 4.0
2019-10-12T11:58:01.823Z
If you find a planet with liquid water and oxygen dissolved in it, at a temperature similar to that of terrestrial oceans, fishes will certainly swim, at least for a while. Salinity also count for the fish health :)
Alchimista
<planet><solar-system><water>
Can fish and other sea creatures survive in watery planets like Neptune or any other planets that has water?
draw134
# Can fish and other sea creatures survive in watery planets like Neptune or any other planets that has water?

(Asked by: username_0 on 2019-10-12)

I'm a bit curious since Neptune does not have a land surface and it is covered with water, I mean water has oxygen right? What will happen if we put some sea creatures in these watery planets? Can they survive or live? I'm not referring to Neptune alone, I mean all the planets that has some large amount of water in it. Thanks.

**Tags:** planet, solar-system, water

> **Comments:**
> **username_1**: If you find a planet with liquid water and oxygen dissolved in it, at a temperature similar to that of terrestrial oceans, fishes will certainly swim, at least for a while. Salinity also count for the fish health :)  

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## 1 answers

### Answer by username_2 on 2019-10-12. Score: 4 | Accepted answer

Being an [ice giant](https://en.wikipedia.org/wiki/Ice_giant), there is no water on the surface of [Neptune](https://en.wikipedia.org/wiki/Neptune). Having a surface temperature of $-201$ $^oC$ any water on Neptune will be frozen. [Extraterrestrial liquid water](https://en.wikipedia.org/wiki/Extraterrestrial_liquid_water) is believed to be beneath the ice surfaces of the Jovian moons [Europa](https://en.wikipedia.org/wiki/Europa_(moon)) and [Ganymede](https://en.wikipedia.org/wiki/Ganymede_(moon)). A sub surface ocean has been confirmed on the Saturnine moon [Enceladus](https://en.wikipedia.org/wiki/Enceladus).

As to whether fish or any other aquatic creatures could survive on watery celestial bodies would depend on the temperature of the water and the availability of nutrients and energy sources (sunlight, geothermal heat, etc.) capable of supporting them. This information is not available to us yet.

> **Comments:**
> **username_3**: In particular the OP statement "Water has oxygen" is not correct. The oxygen atom in water is bound to the hydrogen atoms, and can't be used for breathing. It is likely that there is very little dissolved molecular oxygen in any of the sub-surface oceans  
> **username_0**: Thank you for answering.  
> **username_4**: Neptune's "surface" temperature is defined as the temperature at which Neptune's atmosphere has a pressure of one bar (100 kiloPascal), or just a tiny bit less than the pressure at sea level on Earth. There is no "surface" at that shallow level in Neptune's atmosphere. Neptune's atmosphere remains a gas much further down than that. It's not known whether Neptune has a true surface at all.  

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