OK, so I can't get enough of the puffer that Cathy took photos of yesterday. Here's the regular coloration of the spotted puffers we see, it's from a photo I took about 3 years back. Quite a contrast from the yellow colored one for sure. The shot below is another pic that Cathy took as the puffer from yesterday was just inside the mouth of a cave/puka (puka is essentially Hawaiian for "hole").
Apparently the yellow coloration is more common in other parts of the Indo-Pacific, but for Hawaii it's a pretty unusual sighting. It was definitely the highlight of yesterdays outing, even though they saw a Great Barracuda, a frogfish, a couple of eagle rays, a couple groups of psychedelic wrasses, an octopus and other cool stuff.