Photosphere
Bro seriously he had the option of eating at minimum of 3 fruits considering he doesn't get the other 2 parts of dark fruit and he have up for just one logia. It would have been better if he didn't get any devil fruit considering he has the the 4th haki which work somewhat like devil fruit he just got weakness of water. And giving dark fruit to Robin who doesn't even have kings haki is such a waste. And since he is not keeping her by his side she becomes target of blackbeard......