Ocean Floor Paradise; Fishman Island

explains about Story wise, the concept of Fishman Island was first mentioned in chapter 69, where YosakuJimbei releasing Something terrible to East Blue. Arlong and Jimbei had came from Gyojin Island. Sanji then speculated that the island may be somewhere in the Grand Line, as he dreamed of meeting beautiful mermaids.

Fishman Karate is learned here, as revealed by Oda, in an SBS question.^[1] In the same SBS, Oda also stated that Fishman Island is half-way across the Grand Line. This is meant in the most literal sense as Fishman Island is in fact directly underneath the Red Line.

Later after the Enies Lobby Raid, the Log Pose started to point down, Kokoro, who is a mermaid from Fishman Island, explains that it's an underwater island where fishmen and merfolk live. There is a unique way of going down there.

Location

It is located 10,000 meters under Mariejois, in a giant hole that goes under the Red Line, it serves as an underwater gateway to the New World.

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List of Devil Fruit,; Logia Type

Logia-type , These Devil Fruits allow the user to actually become a natural element in its entirety. From the time their abilities are gained, they are neither completely human nor element in their default state. However, Logia users have the option of turning completely into their element at will. Logia fruit abilities are virtually immune to damage unless the special weakness pertaining to that fruit is discovered, or they are caught off guard and do not have time to use their power in time (e.g. When Luffy crashes into Smoker and Portagas D. Ace and they are thrown through multiple walls) or if seastone is used. Logia fruits are also the strongest of the three types of Devil Fruits.

List of Logia Type

Devil Fruit name	Consumed by
Moku Moku no Mi ; Smoke Smoke Fruit, Plume Plume Fruit	Smoker
Allows the user to create, absorb, manipulate, and turn into smoke. In the English dub, the user is also able to exhale smoke from his or her mouth and is also able to breathe it. "Moku" is the sound billowing smoke makes.
Mera Mera no Mi ; Flare Flare Fruit, Flame Flame Fruit	Portgas D. Ace
Allows the user to create, absorb, manipulate, and turn into fire. "Meramera" is the noise a fire makes when it burns.
Suna Suna no Mi ; Sand Sand Fruit	Sir Crocodile
Allows the user to create, absorb, manipulate, and turn into sand. Its power can be honed to the point where the user can also dry anything he or she grasps, killing the living through dehydration, and causing all other matter to crumble to dust. However, Crocodile turns solid when in contact with any liquid, including blood (or sweat in the English dub), due to the sand sticking together. "Suna" means "sand".
Goro Goro no Mi ; Shock Shock Fruit; Rumble Rumble Fruit	Eneru
Allows the user to create, absorb, manipulate, and turn into electricity. It is called "invincible" among all the Devil Fruit powers because thunder is closely linked to godly power. It also enhances mantora.[5] "Gorogoro" is the noise thunder makes.
Hie Hie no Mi	Aokiji
Allows the user to create, absorb, manipulate, and turn into ice. The user can also lower the temperature of another body if he or she maintains contact with it. The user is also immune to hypothermia, frostbite or any other cold-related diseases. "Hiehie" means "chilly".
Yami Yami no Mi	Marshall D. Teach
Allows the user to turn into darkness and control darkness and gravity. The user can absorb objects and attacks and redirect them back at others, either by sucking them into a dark mist which spreads from the user, or into the user's body itself. Because of this, however, he or she takes hits like a normal human. He or she also has the unique ability to nullify the powers of other Devil Fruit users by simply touching them. "Yami" means "Darkness".

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List of Devil Fruits, Zoan Type

Zoan-type, fruits allow the user to transform into an animal. This fruit provides three forms: the user's natural form, a full animal form (where the animal's size is often greatly exaggerated), and a hybrid form, combining both original and animal form (usually in a bizarre way). In addition, more forms can be achieved using the "rumble ball", though its effects last only three minutes. These fruits are also the strongest of the three types at close-combat fighting. These fruits cannot give human eaters the ability to talk to animals, although an animal eating the Hito Hito no Mi can talk to humans.
Note that these descriptions assume that the user is human

List of Zoan Type

Ushi Ushi no Mi: Model Bison ; Ox Ox Fruit, Ox Ox Fruit: Bison Model

Dalton
Allows the user to turn into a bison or human/bison hybrid. In the English dub, the user turns into an ox or a human/ox hybrid.
"Ushi" means "cow".

Hito Hito no Mi ;Human Human Fruit

Tony Tony Chopper
If the user is an animal, allows the user to turn into a human, and gives him or her a human's intelligence. Oda stated in a SBS column that a human user would simply become "enlightened".[
"Hito" means "person".

Tori Tori no Mi: Model Falcon; Falcon Falcon Fruit, Tweet Tweet Fruit

Pell
Allows the user to turn into a falcon or human/falcon hybrid at will. It is one of the five known devil fruits that allow the user to fly.
"Tori" means "bird".

Inu Inu no Mi: Model Dachshund ; Bark Bark Fruit, Mutt Mutt Fruit: Model Dachsund

Lassoo (Mr. 4's gun)
Allows the user to turn into a dachshund or human/dachshund hybrid at will.
"Inu" means "dog".

Mogu Mogu no Mi; Diggy Diggy Fruit

Miss Merry Christmas
Allows the user to turn into a mole or human/mole hybrid at will. In the English dub, it is called a woodchuck, despite still having the appearance of a mole.
"Mogu" is taken from "mogura" which means "mole"; "mogumogu" means "mumbling" or "chewing one's words", which describes the way Miss Merry Christmas speaks.

Inu Inu no Mi: Model Jackal; Jackal Jackal Fruit, Mutt Mutt Fruit: Model Jackal, Dog Dog Fruit: Model Jackal

Chaka
Allows the user to turn into a jackal or human/jackal hybrid at will.

Uma Uma no Mi ; Horse Horse Fruit

Pierre (Gan Fall's pet bird)
Allows the user to turn into a horse or human/horse hybrid.
"Uma" means "horse".

Neko Neko no Mi: Model Leopard

Rob Lucci
Allows the user to transform into a leopard or human/leopard hybrid.
"Neko" means "cat".

Zou Zou no Mi

Funk Freed (Spandam's sword)
Allows the user to transform into an elephant or human/elephant hybrid.
"Zou" means "elephant".

Inu Inu no Mi: Model Wolf

Jyabura
Allows the user to turn into a wolf or human/wolf hybrid.

Ushi Ushi no Mi: Model Giraffe

Kaku
Allows the user to transform into a giraffe or human/giraffe hybrid.

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