<p>To answer your question: <strong>Currently there is no fruit known as Fish Fish no mi, or similar in effect as you describe.</strong></p>

<p>There has, however, been a question pretty similar to this before (<a href="https://anime.stackexchange.com/questions/5041/would-a-water-manipulating-devil-fruit-user-be-able-to-swim">Would a water manipulating Devil Fruit user be able to swim?</a>) which will provide a bit more insight in this, although it is still speculative.</p>

CC BY-SA 3.0
2015-09-09T17:29:57.350Z
2015-09-09T17:55:56.347Z
2017-04-13T12:54:48.523Z
Dimitri mx
<p>Based on a leak for chapter 999,</p>
<blockquote class="spoiler">
<p> Kaido has one.</p>
</blockquote>

CC BY-SA 4.0
2020-12-16T19:19:12.943Z
2020-12-16T20:20:43.170Z
2020-12-16T20:20:43.170Z
Levi
<p>We have not yet seen a Fish Devil Fruit user. They will not be able to swim underwater due to the Devil Fruit curse, but they will be able to breath underwater due to the Fish's abilities.</p>

<p>Seeing as there has not been a Fish Fruit user thusfar, this statement is speculated on the very similar case that we have seen, where a fishman had eaten a devil fruit. <a href="http://onepiece.wikia.com/wiki/Vander_Decken_IX#Devil_Fruit" rel="noreferrer">Vander Decken IX</a>, a Japanese bullhead shark fishman, ate the Mark Fruit. In chapter 615, Vander Decken IX explains that <a href="https://i.sstatic.net/YLfGr.png" rel="noreferrer">due to the Devil Fruit Curse, he is rendered unable to swim</a>. We can later see him in chapter 631, where he has <a href="https://i.sstatic.net/ktMm6.jpg" rel="noreferrer">put an air-bubble around himself to retain his energy</a> and not to make him able to breathe. This last part is confirmed at the end of the arc, because even after the air bubble had been removed from Noah, Vander Decken IX did not suffocate and was seen alive, being arrested, instead of buried.</p>

CC BY-SA 3.0
2015-09-09T22:41:06.307Z
2015-09-09T22:41:06.307Z
Peter Raeves
<p>Is there any Zoan Akuma No Mi that gives the user the ability to transform in fish (Fish-Fish No Mi)? If so can the user swim in the sea?</p>

<p>@Edit: I don't read the manga, so I don't know if anything like this has already happened or not</p>

CC BY-SA 3.0
2015-09-09T20:03:26.607Z
@nhahtdh It isn't, because no fish fruit has been introduced so far, and even if it was the user would never be able to swim due to the inherent curse of all devil fruits.
Peter Raeves
<one-piece>
Is there a Fish-Fish no mi?
# Is there a Fish-Fish no mi?
Posted by: username_0 on 2015-09-09
Is there any Zoan Akuma No Mi that gives the user the ability to transform in fish (Fish-Fish No Mi)? If so can the user swim in the sea?

@Edit: I don't read the manga, so I don't know if anything like this has already happened or not
**Tags:** one-piece
> **Comments:**
> **username_1**: @nhahtdh It isn't, because no fish fruit has been introduced so far, and even if it was the user would never be able to swim due to the inherent curse of all devil fruits.  
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## 3 answers
### Answer by username_1 on 2015-09-09. Score: 10 | Accepted answer
We have not yet seen a Fish Devil Fruit user. They will not be able to swim underwater due to the Devil Fruit curse, but they will be able to breath underwater due to the Fish's abilities.

Seeing as there has not been a Fish Fruit user thusfar, this statement is speculated on the very similar case that we have seen, where a fishman had eaten a devil fruit. [Vander Decken IX](http://onepiece.wikia.com/wiki/Vander_Decken_IX#Devil_Fruit), a Japanese bullhead shark fishman, ate the Mark Fruit. In chapter 615, Vander Decken IX explains that [due to the Devil Fruit Curse, he is rendered unable to swim](https://i.sstatic.net/YLfGr.png). We can later see him in chapter 631, where he has [put an air-bubble around himself to retain his energy](https://i.sstatic.net/ktMm6.jpg) and not to make him able to breathe. This last part is confirmed at the end of the arc, because even after the air bubble had been removed from Noah, Vander Decken IX did not suffocate and was seen alive, being arrested, instead of buried.
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### Answer by username_2 on 2015-09-09. Score: 4
To answer your question: **Currently there is no fruit known as Fish Fish no mi, or similar in effect as you describe.**

There has, however, been a question pretty similar to this before ([Would a water manipulating Devil Fruit user be able to swim?](https://anime.stackexchange.com/questions/5041/would-a-water-manipulating-devil-fruit-user-be-able-to-swim)) which will provide a bit more insight in this, although it is still speculative.
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### Answer by username_3 on 2020-12-16. Score: 1
Based on a leak for chapter 999,

> Kaido has one.
---
