One of the interesting and weird things I saw in One Piece was the mermen and mermaids in the Fishman Island Arc. But one of the biggest confusion I have is the relation between Shirahoshi and Otohime. I don't know how Shirahoshi can be a real daughter of Otohime. Otohime having such a small body and Shirahoshi being huge even in baby stage. Anyone has any ideas?

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  • 2
    Cuteness has no logic, it simple exists
    – Memor-X
    Mar 28 '16 at 11:43
  • She is a mermaid. Who even knows how mermaids reproduce? Maybe they lay eggs?
    – giraffesyo
    Mar 28 '16 at 17:14
  • It's an anime don't expect the laws of physics or biology to make sense here.
    – Callat
    Mar 30 '16 at 15:21

I found this in SBS Vol. 10

D: When the Arlong guys and the other Fishmen give birth, do they lay eggs like fish?

O: BZZZT. Fishmen are still mammals, so they give birth the way humans do. There are fishwomen too, of course.

From this we can confirm that Shirahoshi was not born from egg. Fishmen and Fishwomen are mammals.

If Shirahoshi was not born from egg the most logical explanation behind her birth is that she was probably born small and had a massive growth spurt. Growing to a massive growth is not impossible because she has royal blood and her father Neptune is of a giant size merman after all.

So the answer to your question is yes. Otohime is the mother of Shirahoshi even with differences in their size.

  • What's bothering me is how did giant size Neptune and normal size Otohime made love with each other. It's unimaginable. -_-
    – bot
    Apr 27 '16 at 3:50
  • Reading your comment makes me think of the meme that would show something like those 2, and then shows a small Hamster eating a banana. I would still say that indeed, it seems strange. Then again, I recall the Angler fish, and remember that nature finds a way.
    – Ryan
    May 1 '17 at 16:26

I don`t remember where I saw this, probably in some SBS or databook, but there are two separate species of fish-human hybrids. One of them is the fishmen/fishwomen, which are the ones that walk on humanoid legs like Arlong. The other species is the merpeople (mermaids and mermen), wich are the ones who need bubbles to move when not in the water, such as Caimie and Shirahoshi.

So Oda said FISHMEN are mammals, but he didn't say anything about merpeople. Meaning Shirahoshi could have been born from an egg, and some real-life fish even fertilize eggs externally so maybe Neptune didn't even need to copulate with Otohime.

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