I like to squeeze the legs close the shell, if they are very soft from molting you can bet there is very little meat in there and i will always throw them back just like Bugs said
Down here in the states it is Illegal to have any soft-shelled crab in your possession. In addition, like others mentioned, there is no need to keep them....they have no substantial meat anyway. Does anyone know how many times a year they molt? It seems to vary, I will have a pot full of molters, then the next week in a different location, they are all hard-shelled.....
Be safe all, Swanny
If you go to the east coast, soft shelled blue crab are a delicacy. ????
Tried that once in a large cage meant for keeping live herring. Didn't work too well, the crabs looked sickly after a week. Ended up letting them go.