Hi Van. Thanks for the info. I guess there are 2 different kinds that are called Halloween hermits.
I looked up Ciliopagurus strigatus on the web and got this:
However, the halloween crab that I'm interested to find out about is this:
They are very colorful in person. The blue on them are bluer than the blue legged hermit crab. With the bright orange/red bands on the legs, it makes for a very good looking crab.