However, there are spider crabs (https://en.wikipedia.org/wiki/Japanese_spider_crab) and crab spiders (https://en.wikipedia.org/wiki/Thomisidae).
I think when learning a new language, pronunciation is important, i have found many times in this program words are not pronounced clearly enough for the untrained ear , for example, the word "krab" sounds like cap, Another example is "Hebben" , I hear "Hebbe," with a silent N. My Dutch partner agrees with me on this point so it is not my hearing, Though i realize that in general conversation we all loose an H or a J etc , its not helpful to a complete novice , sorry for going on but its frustrating ,Cheers
True crabs (as opposed to king crabs, horseshoe crabs and a few other oddball so-called "crabs") are not arachnids. The data for horseshoe crabs:
Most things we call crabs are crustaceans (a different sub-phylum of arthropods than arachnids).
(King crabs look a lot like real crabs, but they're not--convergent evolution is fascinating!)
The crabs on "crabs of the netherlands" look mostly or entirely like real crabs.