No man he lost his penis __I can see it your asking why?because in old Japanese mythology they believe that fishman penis has like some sort of magical power this why also the species are in the verge of extention .
I think its weird that Jinbei all of a sudden lost his honor part of his personality in the face that what it SEEMS, note seems not what it is, to have happened is that he said no to the wheel left and then just betrayed her. To me that is not what Jinbei during FI would have done.
while I love this arc there seems to be a lot of things that Oda had bigger plans for and them just decided not to do them. He could have lost lifespan but I have to agree with Nova his dignity and honor are what took a hit.