Sea Beast

Sea Beasts are a class of large aquatic mammals found on the Grand Line. Their appearance is generally based around a real-life animals, such as cats, with added scales and features suitable for living underwater. The first Sea Beast encountered in the series is the Sea Cow Mohmoo.

Sea Cow
Sea Cow (海牛) is a sea creature that acts, resembles, and sounds like a normal cow; however, it is apparently a carnivore. It seems to have no problem staying on land since Arlong's crew pulled it right through Gosa Village without damaging it. Oddly, sea cows are classified as type "A" creatures "Big Friendly". They may be a pun on real-life dugongs and manatees, which are commonly referred to as "sea cows". The first and so far only one that appeared is Mohmoo, who first appeared in Chapter 73 and Episode 31 as part of the Arlong Pirates.

Sea Boar
A Sea Boar (海イノシシ) appeared in Hatchan's cover story where Hatchan saved it from an attacking sea monster. It turns out that earlier the sea boar had eaten Keimi and Pappug and spat them out shortly after being rescued. It first appeared in Chapter 193.

Sea Cat
Sea Cats (海ネコ) are huge, cat/whale creatures that live near the shores of Alabasta. They are classified as a type "A" creature, being "Big Friendly". A huge sea cat was seen by the Straw Hat Pirates before coming to Alabasta. Vivi stated that it is a legendary animal that is a sacred to Alabasta, and must not be harmed. In the 4kids dub, she told them the "Cat Shark" was an endangered species. Their name is a pun on the Black-tailed Gull, which its name kanji is literally translated as "Sea Cat". Their appearances resemble that of a maneki-neko. They first appeared in Chapter 157 and Episode 92.

A Sea Kitten was later seen in Solo Journey of Jinbe, Knight of the Sea, where it became lost and could not find its way home. Jinbe then escorted the little sea kitten back to its underwater hometown.

Sea Monkey


The Sea Monkeys (シーモンキー) are sea creatures resembling monkeys. Found after returning from Skypiea and before arriving at Long Ring Long Land island, they have powerful flippers that can cause tidal waves. The Fanged Toad Pirates' ship sank due to the waves they created. They first appeared in Chapter 303 and Episode 207.

Sea Raccoon
A Sea Raccoon (海ダヌキ) differs between the anime and the manga. Both versions are visual puns on "umidanuki", the Japanese word for beaver.

In the manga, it is a giant Sea Beast and first appeared in Chapter 490.

In the anime, it is a shapeshifting animal and first appeared in Episode 382. However, its transformations are limited to its original size, roughly that of a real raccoon, such as transforming into a doll-sized Nami. Lina is the only known person to own a sea raccoon. She and her pet, Nukky, appeared in the Spa island filler arc with her sister Sayo.

Sea Rabbit
A Sea Rabbit (海兎) is a sea creature resembling a lagomorph. One was discovered near the Red Line by Luffy, Brook, and Robin traveling in the Shark Submerge III, which consequently was defeated by a Gomu Gomu no Rifle. Upon defeat, it spits out Keimi and Pappug. The first one debuted in Chapter 490 and Episode 385.

Sea Hippo
A Sea Hippo (海カバ) is a massive sea creature with the face of a hippo. There was a Sea Hippo among the victims of the Stomach Baron in Chapter 591 and Episode 507.

Sea Lion


The Sea Lion (海獅子) is a sea monster that lives in the depths of the ocean. One was seen in the New Fishman Pirates' army of sea monsters just outside Fishman Island in Chapter 607 and Episode 526, which was later ridden by the Flying Pirates during their attack at Ryugu Kingdom. It may be based on the sea-lion, a mythical creature in heraldry with of the head and front limbs of a lion with the tail of a fish, or the merlion, another mythical creature with the head of a lion and the body of a fish. It is a visual pun on real-life "sea lions". It is 55m (180' 5") by estimate in length.

Sea Bear


The Sea Bear (海熊) is a sea creature that lives on the ocean floor. The only one seen is under the command of the New Fishman Pirates, and it appeared first alongside the Sea Lion and many other sea beasts under the crew's command in Chapter 607 and Episode 526. It was on a rampage, but stopped when some fishmen tried to frighten it with fire. The kanji for sea bear can mean "fur seal" in Chinese, which the sea bear somewhat resembles. It is 50m (164') by estimate in length.

Sea Rhinoceros, Sea Gorilla, Sea Elephant, and Sea Giraffe


The Sea Rhinoceros (海サイ), Sea Gorilla (海ゴリラ), Sea Giraffe (海キリン), and Sea Elephant (海ゾウ) are sea monsters that live in the depths of the ocean. They were seen as the New Fishman Pirates' army of sea monsters just outside Fishman Island in Chapter 607 and Episode 526, and were later ridden by the Flying Pirates during their attack on Ryugu Kingdom.. They later go on a rampage and destroy everything in their way, as read by Jinbe on the Newspaper. The sea elephant is a visual pun on real-life "sea elephants".

Sea Squirrel
A Sea Squirrel is smaller species of sea beast. One was under the ownership of the New Fishman Pirates. It was used by Hammond to attack Luffy, but the beast was easily subdued by Luffy's Haoshoku Haki.

Sea Leopard
A Sea Leopard was one of New Fishman Pirates' sea monsters.

Sea Pig
Sea Pig (海ブタ) is an ingredient for one of the Attack Cuisine dishes, Hormone Soup with Sea Pork. The name is a pun on the Japanese word for dolphin (海豚), the kanji of which literally translates to "sea pig".

Sea Dog
Sea Dog (海イヌ) is a Sea Beast resembling a dog. In Solo Journey of Jinbe, Knight of the Sea, one is seen working as a police officer, wearing a police hat and badge, and even having a mustache.