Marine Admirals are some of the most powerful characters fans have seen One piece over the years. When it comes to navies, admirals are their strongest currency. Even among the World Government as a whole, Marine Admirals are some of the strongest fighters. Fans know that these individuals have it in them to take on even the likes of Yonko, though defeating them is a whole other conversation.
Still, naval admirals are one of the highest levels One piece World with countless powerful skills up their sleeves that they have shown fans over the years.

One Piece: The 32 Strongest Swordsmen, Ranked
Considering its tumultuous setting, it's not surprising that talented swordsmen populate One Piece. Here are the strongest of the range.
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Ryokugyu: Groves Of Wrath
While Admiral Greenbull hasn't shown fans much of his abilities yet, fans do know that his Mori Mori no Mi has some very interesting abilities. The strongest power he has demonstrated so far is called Groves of Wrath.
This technique basically means that he slammed his fists directly into the Earth and then freely manipulated the roots. In these roots, he can cover his upper body, creating a golem-like figure. At the same time, he can also create giant muscular fists from the ground and surround the entire terrain with vegetation that he can manipulate as he pleases. This is an incredibly powerful technique that gave the Pochevs quite a bit of trouble and even a dragon like Momonosuke struggled with it. Gross of Warth may not be the strongest ability he has up his sleeve, but it's definitely a very interesting ability.
5
Kuzan: The Ice Age
When it comes to former Admiral Aokiji, fans know he has some powerful techniques up his sleeve. Of all that he has performed so far, and there are many, the strongest is definitely Ice Time. This ability allows Kuzan to freeze almost anyone to the bone and basically end the battle in one hit. This technique can basically one-time the vast majority One piece A world without effort.
There are only a handful of individuals who can avoid this freeze. For example, Whitebeard uses the vibrational powers he was blessed with from his Devil Fruit to break free. Meanwhile, Garp used the sheer force of his Conqueror's Haki to break through. Dofamingo, on the other hand, barely escaped death as he was able to free himself before he was frozen to the bone. However, Kuzan could basically kill Doflamingo without lifting a finger.
4
Fujitora: Raging Tiger
Admiral Fujitora has quite a few powerful gravity-based abilities up his sleeve, stemming from his use of Zushi Zushi no Mi. He definitely has other powerful abilities that he hasn't revealed yet. But for now, the strongest power that fans have seen him use is Raging Tiger.
Fujitora basically uses vertical gravity with this technique and destroys his surroundings with the force of gravity alone. He can also use it to the point where it begins to bend the space around him and deal a lot of damage to enemies. The true potential of this technique remains unknown as Fujitora has never been fully fleshed out in the story thus far.

One Piece: The 6 Strongest Marines from the Old Generation, Ranked
The new generation of marines is strong, but they can't compare to these legends of the old generation in One Piece.
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Kizaru: Yasakani no Magatama
When it comes to Admiral Kizaru, fans have seen him wield many powerful abilities, but Yasakani no Magatama definitely ranks first. This attack will cause him to launch a powerful barrage of gem-shaped light beams at the opponent. The target is completely flooded with them and there is no escape. Even the most experienced Observation Haki users will struggle with this technique. He used it on Marco, who was only able to survive due to the power of his Phoenix Fruit.
Meanwhile, in Egghead, he used this power again, but this time Luffy was able to effectively counter it. He can also use advanced techniques such as forming beads into clones of himself and then confusing the enemy, as well as attacking with these clones.
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Sengoku: Shockwaves
The former admiral of the Sengoku fleet is one of the strongest characters in the story, as evidenced by the fact that he fought against the likes of Whitebeard and Roger. With the abilities of his Daibutsu Devil Fruit, Sengoku can generate powerful shockwaves from the palms of his hands.
These shockwaves can cause widespread destruction, and it did in the anime equal to the tremors caused by Gura Gura no Mi. He probably has many other powerful abilities that fans haven't seen. However, right now, the strongest ability he has is these shock waves that can seemingly cover entire islands.
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Akainu: The Great Eruption
By far, Akainu's most powerful technique is the Great Eruption. Once again, there are probably other techniques that he hasn't shown fans, but at this point, Grand Eruption seems to be his biggest technique. With this technique, he creates an incredibly massive fist of magma and then hurls it directly at his enemies. Since this Devil Fruit has destructive abilities of the highest orderThis attack can prove to be deadly and basically kill almost anyone in the story.
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