Just wanted to add an update to the knowledge of Jonah Crabs. It seems that NY State now has new rules on Jonah Crabs; limitations (50 per day) and size minimums (4.75 inch):
https://www.dec.ny.gov/outdoor/7894.htmlIIRC, they seem to come in a big wave in the spring (around May) for about 2 weeks just before blue crabs begin waking up. Good luck!
The crabs that we are catching on the South Shore bay are not Jonah crabs they are Atlantic rock crabs