I fail to see where the game suggested anything involving a connection between the Parella and the Zora. In WW, it was made perfectly clear that the Rito were once the Zora. There's absolutely no mention of the Zora in SS, including in Lake Floria. That's a huge red flag.
Zoras evolve faster than any other race in zelda. At first, they were heads sticking out of the water shooting fireballs at you. In later games, they were the zoras we know and love, the rito, and then either the patella or tad tones. They're not gone. Just different.
There's a difference between stating your opinion and saying "This is how it is. FACT!"
And I fail to see how you could not understand the second half of my post. I was merely replying to the points you made.
You're missing something crucial here. In WW, Zoras previously existed in OoT. That's why they're mentioned. In SS, no-one knows about Zoras, at all. That's why they're not mentioned, and why Lake Floria is called Lake Floria and not Zora's Domain. Simply put, there cannot be any in-game confirmation because they simply have not existed yet.
I'm not sure what everybody else thinks, but I take the Hyrule Historia as canon. I also take the Zora concept art as confirmation that the two are canonically related.
Occam's razor means nothing to me as I see people here using it all the time as a form of cop out argument. It's a terrible way of disproving something and relies on nothing more than being too lazy to look a little deeper into things whenever I see people here using it.
See the top for my opinions on this argument
I get what you're saying: It wasn't directly mentioned in the games, so it isn't true. But might you consider the possibility that they may have been intended to be [ancestors to the] Zora at some point in development?
Posted below is the official concept artwork from Hyrule Historia. In it, many of the designs seem to resemble the Zora. Just to be clear, this is not an attempt at strengthening my support of the Parella→Zora theory; this is just to introduce the possibility that the Parella may have been planned at some point to be [ancestors to the] Zora.
It's very likely that Nintendo was originally going to have them be the Zora race with a different name (or maybe still called Zoras), but with the tremendous change in design, I'd say they decided to make the Parella a completely different race.
I like your reasoning here. It's the one thing that has continuously kept doubt in my mind. Yet in considering the ramifications of this we leave too many open ends. What happened to the Parella? Where did the Zora come from, and why do they have such a strong connection to the Hyrulean Royal Family? The change of deity from SS to OoT certainly doesn't help my cause, but there's just too much to like about the Parella-to-Zora theory.