There’s A Hookshot Spot Right Here
Speaking of hookshot spots, in the first room with the spinning water wheel, you’ll note that there is a red-colored fountain that is just out of reach of your jump. As you progress through the temple, you’ll be able to turn it on, but you still won’t be able to jump to it, even with the Bunny Hood giving you extra momentum.
Directly above it, there is a hookshot spot. Right there.
This seems like a really obvious thing, and perhaps too small to note. But this hookshot spot is the most elusive thing in the entire game. Hours can be wasted looking for platforms to get to that fountain, or perhaps for some other method to get across to that fountain. But you don’t have to waste those hours, because now you know that this stupid hookshot spot is here.
If you are anything like me, it will also take you hours to realize it is here, because nowhere else in the Great Bay Temple does a hookshot spot appear like this. So save yourself the headache. Make a note, tattoo it into your skin, whatever you need to do. Don’t live like me.