Shrimping in Oregon

I bartend at night and often times fishing is the hot topic with patrons. Last night was no different. This guy told me that many years ago that him and his friends would wrap crab traps with burlap sacks and drop them in the rocks near Simpson Reef for what he called "Ghost Shrimp". He might have been a little drunk. I've always considered sand shrimp to be ghost shrimp. What he described was a very large shrimp with a nice sized tail. This made me think of some sort of rock prawn.
I guess the shrimp try to pick at the baited, burlaped crab trap and end up getting their legs stuck in the sack. He said that short soaks were key to success because once they get stuck they become fair game for all bottom dwellers.
Has anyone heard of such a thing?  I guess I could always try it for myself but I was curious if anyone had any knowledge on this.

Probably talking about Coon Shrimp. They hang out in shallower water often around pilings and reefs. 

In Alaska, at least amongst my peers, when we say Ghost shrimp, we are talking about what many folks call glass shrimp.  They look like shrimp you eat but are transparent and smaller, about the length of your pinky and thinner.  We dig them up every now and then when we go clamming. 

We don't have sand shrimp up here (like the steelhead bait.  Mantis shrimp looking critter.)

I know sandshrimp make great salmon and steelhead bait.  I have heard the same about ghost/glass shrimp.  Just sandshrimp seem a lot easier to get a hold of and maybe more importantly, keep alive.