Phenomenal exploration among the various kelp. There's tons of amazing rocks to swim around and canyons to swim through with a bunch of big rockfish hiding there.
The most prominent canopy is from Giant Kelp (stunning cathedral light views!) but there's endless woody keep all 6 feet tall creating a second under-canopy. Getting below that gives you a forest view with various inverts to be found. Saw two Sunflower Sea Stars!
Note: Curly's Resort in Sekiu has a compressor but they're not a hasty service. If you're staying the night then plan to drop off tanks in the afternoon then pick them up later the next morning