Confidence: I'm as sure as I can be.
Notes: Distinctive pear shaped carapace differentiates from Hyas coarctatus. Carapace width of this species is up to 31mm, coarctatus is slightly smaller. The first pic(and 2nd) is a female H. araneus showing the broader abdomen than that of the male in the 3rd pic. This observation is in relation to another ID of a larger spider crab species linked below.