Amazing book on the fauna in the seas around me, North-West Europe. I got this as a recommendation because of the easy way of recognising and determining crab species that look similar. I used an older book before this with only Dutch crustaceans, but because of the warming seas I needed something updated and with more crabs from the seas around the North Sea. Easy to use, clear diagrams. This is not a book you take along with you on the field, because it's very big and heavy. :-)