

In chapter 824 of One Piece, Jack is shown lying motionless on the ocean
floor, waiting for his crew to come and rescue him after being defeated by
Zunisha the giant elephant. His mask is broken and his shark-like teeth
(resembling Arlong and Hodi - the shark fishmen) is revealed. However, unlike
other devil fruit users, he does not pass out or have any difficulty breathing
in the ocean.

My question is: is Jack who happens to be a Zoan type devil fruit user also a
fishman, or is there any other possibility as to how he can survive for so
long under water?


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one-piece
Is Jack a fishman?


Yes, Jack being a fishman is the only logical explanation for him surviving in
the middle of the ocean. As you noted already, he looks like a fishman too.
His devil fruit prevents him from moving but that won't stop him from
breathing (remember in Arlong park, Luffy could breathe while his body was
under water when Nojiko (Nami's sister) and Genzo got his head outside of the
pool).

It also seems it was not the first time he found himself at the bottom of the
sea as he is expecting help as if it was normal, and we can assume he either
can speak with nearby fishes or he has a vivre card on him, and is only going
to die if nobody comes to his rescue before he dies from hunger.


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2016-07-16T12:36:22.667
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I think he is part fishman. From what I could tell the moment his mask came
off he resembled that of a predator-type fishman. I believe he can breath
under the water but he is immobile.


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2017-03-28T16:23:56.320
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In direct contradiction to the previous answers. Jack is not described or
defined as a fishman according to the one piece wiki linked here [Jack
Description link](http://onepiece.wikia.com/wiki/Jack)

> Jack is a man of massive stature, dwarfing his crewmates and even the very
> large minks Inuarashi and Nekomamushi.

Key phrase being **Jack is a man**. Given that there is also substantial
evidence adding to the credibility that he is in fact human.

**Fishmen in appearance**

It is further described in the wiki that Fishmen are described as the
following:

> Fishmen are more fish-like than merfolk, usually looking like a combination
> between a man and a fish or other aquatic creature, such as an octopus,
> manta ray, or sawshark; however, they still have legs (in fact, Decken has
> four). They also have gills between their shoulders and necks, sometimes
> covered by their clothing, as well as often having webbed hands. Depending
> on species, they may have multiple limbs (mainly extra arms).

Linked [here](http://onepiece.wikia.com/wiki/Fishmen)

Given that all fishmen have some sort of gills between their shoulders and
neck and that we have seen Jack full frontal topless and he's shown no signs
of these due to the fur coat that he wears.

This can mean 1 of 3 things:

1) He is not a fishman and there is a logical possibility for why being above
head level submerged in water wasn't causing him to drown, die or freak out

2) He is a merefolk but it hasn't been fully discussed yet and his lineage and
capability.

3) He is actually a fishmen but couldn't move due to restrictions via devil
fruit powers.

I disagree with reasons 2 and 3 because what sense would that make? He is the
first antagonist in the series to not face any of the straw hats bringing him
back either in the current whole cake arc or the next arc (hopefully wano
country) ruins that nieche for his character. If he was in fact fishman or
merefolk why didn't we see or hear anything about him from the fishman island
arc? Or Jinbe? Or Kienmon and momonosuke? It doesnt make logical sense that
all of those ppl just conveniently forgot him.

In summation I believe that reason 1 is the fact here. But that leads to the
burning question, how is he ok being underwater?

There are 2 possibilities in this case, the first is that as a zoan type he
could have matriculated his lungs to a point where they hold more air without
expanding the rest of his body due to enhanced control over his zoan power.

The second and most likely case is that he is in fact drowning to death but
hes such a tough bada** that he doesn't show that he even cares and might
actually survive.

**Truth of the matter is**

Nobody actually knows for sure beccause it's too soon to tell, we will know
for sure once the manga reaches a point where the straw hats or someone deals
with Kaido and we learn a bit more about the beast pirates. But as of right
now with the information we have in front of us. Jack is a man.


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Just an idea, but maybe there is something about the synthetic devil fruits
that they all used that decreases their susceptibility towards water?

Or maybe it could be related to Kaido and his inability to die.

There are a lot of unanswered questions that could be tied to why Jack can
survive underwater, but I personally don't agree that it's because of being a
fishman. The creep from Fishman island that wanted to marry Shirahoshi
couldn't survive in water because he had a devil fruit power.


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2017-07-09T23:37:05.403
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Jack is a half breed, like the fighting fish half-breed in Doflamingo's crew.
It would explain his human appearance and his teeth changing just like
Doflamingo's crew mate, and being a DF user, it restricts his movement in
water.


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2018-02-08T05:19:21.000
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Jack is not using a synthetic devil fruit then why wouldn't most of Kaido's
crew be using them if you could just make a Ancient Zoan whenever why make
modern animals Sapi also looks more human then fish man so Jack could be half
for all we know .


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2018-09-12T01:32:24.800
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Most of you are saying either he is not fishman but human or hes a fishman and
not human, maybe even a merman. But how about half? It is shown to be possible
that someone can be part fishman and part human. example: Dellinger, He was a
human that was part fighting fish so it is possible that Jack is part fishman,
explaining his human appearance but seemingly fishman strength and abilities
such as breathing under water. He also seems to have horns, but those do have
metal parts at the beginning on his head, so it is possible they are fake.


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