Second this! Also while not totally what you were asking I got a huge kick from this reef fish ID book. If you're going to be doing any snorkeling/diving this really makes it all the more interesting!
I really liked this book, and it's counterparts. This one has all the related books in the "users also bought section"
Reef Fish Identification - Florida Caribbean Bahamas - 4th Edition (Reef Set) https://www.amazon.com/dp/1878348574/ref=cm_sw_r_other_apa_gkowxbSEPQ258
It's got full color pictures of fish, and a bit of information on them. It's also easy to search for what you saw, and if you want more info, it can give you a name to Wikipedia.
Oh, and get a copy of this book to take too. I signed off over 1/3rd of the book during my first week there.
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It's a lot more fun if you do it yourself, and you learn more.