User blog comment:Wirdang/shirahoshi on the picture/@comment-3202520-20110807130442

well considering what we know about mermaids and the urashima casket we could assume one thing:

the urashima casket was mentioned so oda may actually use it on shirahoshi but will it actually make her larger? well i formulated 2 possibilities


 * 1) 1 Well having in mind that shirahoshi's fish species only grows like to 70cm wich is strange seing shirahoshi is giant sized it could be assumed she has a disease that affects her growing wich they do actually exist.

But these kind of disease only afect how you afect in one way so you either become giant or dwarf if there is one who changes you from normal to giant to dwarf at some point in time is beyond my knowledge but in one piece all is possible and if shirahoshi actually has that disease if she uses the aging casket she may split her tail and shrink if lucky


 * 1) 2 People in the real life naturally shrink trought the course of the year due to the gravity afecting sponge like strucutures in your spine thoug they shrink really slowly but in one piece world mermaids live in the bottom of the sea 10,000 under sea level the gravity and pressure at that low altitude would destroy any submarine

YET mermaids and fishmen swim there so their bodies can withstand those pressures but FOR HOW LONG? certainly not forever or they wouldnt make a city with sea level atmosphere so I assume if they spend some hours at that dept they will be afected and so will the sponge like things in their spine

so if shirahoshi used the casket at the bottom of the sea the years passing in seconds will efect her structure and so will the pressure from all those years shrink her and possibly thougen her

I actually believe the second one is more plausible and safer as we dont know what kind of sidefect the disease could cause thoug the second one may kill her from the pressure all those years

sorry for my essay and gramar errors