A few days ago, I was in Chinatown and picked up a bag of dried shrimp (the itty-bitty white kind with the heads and shells on) While picking over the shrimp I (as is common for this kind of stuff) found a few odds and ends of other forms of dried seafood (little crabs, little squids, pieces of little fish (including what appears to be the head of some sort of gar or needlefish) and so on). Normally I throw these out, but I got to wondering are THESE edible too, or more accurately can they be used as stock ingredients? I am particualry interested with regards to the crabs, as I cannot help but notice that a LOT of the little crabs that show up are FULL of roe (or at least, a blackish bubbly looking substance that is where one would expect the roe). I've currently simply got the stuff stored (with the tiny amounts, it is obvious that, if I did want an all dried crab stock, I'd need to go through a LOT of dried shrimp) so there is no hurry. But if anyone has any experience they can offer, it would be appreciated.