The exact number of crabs in a bushel depends on the size of the crabs, but a bushel of average-sized crabs is typically around six to seven dozen.
A bushel is a measure equal to 8 gallons. Thus, a bushel of crabs is the number of crabs that fit in an 8-gallon container. The size of crabs changes depending on the time of year, with larger crabs being present in warmer months. "Heavy" crabs that are near the end of their molting cycle take up the same amount of room in the bushel, but they contain much more meat and much less water.