I bought the 2CD version of Sakanazukan yesterday so I took pictures of the packaging and some interesting parts of the booklet.
At first I was like "book of fishes? what is that suppose to be?" but the 'fishes' are their songs!

so each page contains a song, facts like length, recording time, release, ect. then a paragraph description and lyrics. It's pretty cool!
It has some information on the members and some pictures of actual fish as well lol
Of course I can't take pictures of the whole booklet because it's a lot but if there is any particular song you want, I can do!