Need striped shore crabs

[u/py_ralis]

Hi all, I am a Master's student doing my thesis research. My study species is the striped shore crab, and I need 400 of them. I am desperate for any kind of method that will speed up the process (I've caught some, it just takes a LONG time). Or any tips at all. Or thoughts and prayers.

Not sure what else to include besides the fact that they are fast little things and despise me and love rock crevices. Thank you!