The sun sets fairly early in Egypt, so you should try to do a snorkeling trip in the very late afternoon, just before it gets dark. You will start to see the lionfish, bigeye and squirrelfish come out of caves and crevices and start to roam around. Though the fish usually are red or dark red in color and thus look brownish/dark, they may also have other colors. Varying colors are shown for the Crescent-tail bigeye in the book, but some of the other species may also look different. Try to compare the pictures below with those in the book.
If you dive down and look under overhangs or peek into crevices you will notice many of these species. And perhaps also a lot of others… – e.g. the Red Sea Soapfish.
The Soapfish has its name due to a foamy substance it can release if attacked.
The Peacock grouper males have a harem of 2-6 females. If two males have a territorial disputes, they might engage in a “color battle” in which they darken their color and repeatedly switch their bars from dark to light. The loser becomes pale and retreats.
I have made several slow-TV recordings (where the camera is recording a video during 30-60 minuttes, while I am not nearby to disturb. As you can see in the video on Youtube, these fish really stay in the shadows the entire day…