Easy poser this, which of the following in your considered opinion is going to be the fastest mover/swimmer... underwater?


Aquaman Vs. Wonder Woman

Fathom Vs. Spider-man

The Hulk Vs. Aquaman

Triton Vs. Marrina

Impulse Vs. Jesse Quick

Tiger Shark Vs. Attuma

Namor Vs. Vixen

How could they swim OUTSIDE water, eheh? I'm just kidding, don't worry.

Aquaman Vs. Wonder Woman:
Aquaman, no doubts about it. WW can indeed move faster than a regular human inside water, and even way, way more faster than a regular human outside water but, she's far way slower - overall speaking - than Aquaman inside water... I mean, I bet she can still "repel bullets" with her arms movements even inside water, but, when she starts to swim - moving her whole body - inside water... she just can't do what Artie can do, she can't swim or maneuver like him, that's it... it should not be like this, you know, for creatures like WW, Supes, Black Adam, Caps Marvel, etc... they SHOULD be able to "fly" inside water, and, pretty fast, I mean, they can fly much faster than sound speed on air or space, and heck, at least Superman can even fly INSIDE THE GROUND, with earth and lot's of rock's on his way, whe already have seem that multiples times, and they should at least be able to easily surpass the speed of sound inside water, but we just don't see they doing that... Aquaman can swim at 1000 knots, and that's 1.852 km/h, that's higher than the sound speed on air, he's that fast.

Fathom Vs. Spider-man: I'm not used to read Fathom, but since she's a water creature, even if Spidey could - I really don't know the swimming speed of both characters - surpasse her, water is not his place, and she will eventually beat him completely in a underwater swimming race, he needs air, right? Heck, I don't even know if she needs air either...

The Hulk Vs. Aquaman:
Aquaman, period. Swim way faster, and can maneuver even more, and eaisly dogde and avoid all Hulk's efforts to hit or reach him.

Triton Vs. Marrina:
That's "almost" like Sheetara vs Lion-o "Thundercat's" race contest episode. Marrina is the fastest Marvel swimmer EVER. She could reach 900 knots, but, she simply can't sustain that speed for a long time, she reduces her speed after a little while, BUT, in the short period that she can sustain 900 knots of underwater swimming speed, she can freaking disappear and be competely of of sight of ANY Marvel swimmer, she has done that LOT'S of times, Namor could not simply conceive her swimming speed, he could do nothing but simply watch her fastly disappear's, he simply could not react... once, Attume used special Atlantean submarines to pursue her, and she was weak at the time, and, it took more than a week to finally reach her, and, it was on that short period of time that she get's slower.

Impulse Vs. Jesse Quick:
Swimming on the water surface, I bet Bart can easily outrace her. Inside water? I think she's more capable than him, she can think, she's really smart and uses her brain, not to mention that she's more experienced than him, but, who knows... Bart's still faster than her, overall speaking, but I think his short experience will be too much for him in a underwater swimming race agains't her.


Tiger Shark Vs. Attuma:
In short races, Tiger Shark. In long races, Attuma's endurance will make the difference.

Namor Vs. Vixen:
I really don't know which underwater speeds her totem can grant her, but I assume she can be as fast as the fastest water animal, right? Namor is a little bit fastest than that, and, he's on his enviroment... he will win.

My underwater top list of fastest swimmers is: and yes, i'm ignoring a lot of DC swimmers here, some Orin's enemies that are almost as fast as him;
Aquaman > Mera > Marrina > Koryak > Tempest > Namor/TigerShark/Attuma

Based on Namor's recent showing of 300 knots(+), he should be next in line behind Marrina. Also, I never understood why Tempest/Garth was so far below Orin/Arthur/Aquaman. In continuity, he's always been very comparable physically in both feats and when they have fought one another (at least since he has matured even as Aqualad). Aquaman is supposed to be able to lift 60 tons in air while Tempest can lift 8 tons. Aquaman can swim 10,ooo feet per second while Garth can swim AT 85 miles per hour. Aquaman can withstand depths of at least 20,000 feat or better while Tempest can handle depths of 3,400 ft below the surface. Both pre- and post-crisis, he has seemed at least close to Aquaman. Also, I wondered why you rated Mera so high in speed?

Orin and Garth have different physiologies, they are not from the same species. Mera gave Artie a pretty hard time in the past, pursuing him / trying to kill him, and sometimes she barely surpassed him, he manage to scape only because he can maneuver faster tha her, and his thoughts were: "I almost forgot how fast she is"... Mera is from another dimension, she's not from this plane of existence... in fact, in that same story, she was impaled, and, on her funeral, she just "woke up"... totally different physiologies. That's curious, at least to me, after reading lot's of "Aqua and his friends" stories, be pre-crisis or post-crisis, Artie always showed to be a faster swimmer than Garth, not to mention, he was also physically stronger too. So, Namor is reaching 300 knots now? Ah, Marvel... thank God I've stopped reading Marvel about 15 years ago, when was still funny. I've always seen Marvel fans complaining how DC heroes where "unrealistic way too powerful", and Marvel is boosting even more and more her heroes in the past 15-20 years... people who could die after falling from tall buildings, like Thor, Hercules, Namor and others - even on the nineties - are now able to fall from space to Earth, or even transpassing planets - cough, cough, Stormbreaker series - without even getting too dizzy... that's a completely shame. Still, Koryak is faster even then this new boosted Namor.

Aquaman.





Fathom.





Aquaman, again.





Triton.





The don't swim. The run on the surface of the water. It's what DC speedsters do.





Tiger Shark, I think.





Namor.