Ovigerous crabs were housed inside opaque plexiglase or PVC incubation tubes until
hatching occurred. The tubes Ž20.0 cm long=15 mm inside diameter. simulate a
burrow. A rod through each end of the tube prevented the crab’s escape. Tubes were
suspended vertically from a stand. The tube bottom was immersed 2.0 cm in a beaker of
seawater, changed daily. When hatching occurred, the beaker served as a reservoir for
the larvae.