Wait wait wait......The Zora king in OoT is the 16th. Look:
This is weird...
Edit: I've figured it out. The person who says this isn't Aonuma - it's the interviewer:
compare:
to
Well, I can't really argue with that.
Different localizations perhaps? Either that or different children. Zora CAN live 400 years.
The freezing only occurred on the Adult timeline so it had to be frozen a second time.
There's not much else I can say.