If youre really into origami, Origami Sea Life looks like an amazing book to add to the collection. Use the new Look Inside feature to see what you can make. Apparently the models are quite realistic looking. All reviews so far have received 5 stars, like this one:

I Am The 2nd best Origami Master
“This Book is soooooooo easy for me I Like To Make Hermit crabs for all my friends that need a little boost. the Models Are Not For Kids Who Can’t Make Anything Or Maybe A Crane Or Something.I Will Never Be As Good As Michael Simmons.”