Which Sea Beast was pulling Caribou’s ship when they attacked the Sunny on the way to Fishman Island?

Who was trapped by Surume (the Kraken) when the SH defeated him?

Where is the torchlight feature located on Franky's body?

Who is the oldest of Neptune's children?

The SH are wrongly suspected of capturing mermaids. But who really did it?

After Whitebeard’s death, who took over the protection of Fishman Island?

What allows daylight to reach Fishman Island?

To see Fukaboshi who's supposed to be there

Why does Shirahoshi really wanna go the the Forest of the Sea?

Fishmen usually have children that resemble their parents.

Who drew Surume like this?

What happened when Sanji first saw Shirahoshi?

After which building was Arlong Park modelled from?

She had a curse making her feel the pain of her people

Why was Queen Otohime so emotional and compassionate?

What is the age difference between Arlong and Hody?

He enjoyed the surface world so much he stayed longer

Why was Fisher Tiger’s latest trip so long?

(and was a former slave saved by Tiger when he raided Marie-Geoise)

Which child did the Sun Pirates help get back to her hometown?

How old was Shirahoshi when she first displayed her powers as Poseidon?

The arrival of the Celestial Dragon Saint Charlos

What event led to a commotion that allowed Vander Decken to make Shirahoshi his right hand target?

Which very important character is first mentionned with the poneglyph of the Forest of the Sea?

Who is Madam Shyarly the sister of?

He doesn't want people to associate pirates to heros

Why doesn’t Luffy want to be a hero?

How many fishmen does Luffy defeat with his conqueror haki?

(chap. 643) This changes in the anime with filler episodes, but humans originally did nothing to Hody to ignite his racism

/!\ manga answer! (anime fillers slightly modified his backstory)

What did Hody personally endure that led to his hatred for humans?

What technique does Luffy use for the first time against Hody and is a reference to Ace?

What berserk form did Chopper manage to control and use reasonably after the timeskip?

It didn’t and it destroyed half of the island

The royal guard managed to trap it in a giant bubble

How was the Noah able to stop before destroying Fishman Island?

Who gives blood to Luffy after his battle with Hody?

When will the next tea party be when Tamago and Pekoms visit Fishman Island?

When Big Mom calls, who answers the transponder snail?

What group of animals accompany the SH as they reach the New World?

How well do you know Fishman Island arc? Let's find out. 
A few questions are easy, some are ok, most are hard (some are vicious). 
I also added some random bits of information here and there from the SBS and additional pages. 
Manga-based only! Some answers might be slightly different in the anime adaptation, so we're only looking for stuff that has been cited/has appeared in the original material.