Sows spat on sea bottom and covers with sand and shell mixture.
Patrols shrimp ponds and tidal pens on foot or by motorboat to detect presence of predators.
Transfers finfish from tanks to rearing ponds, using dip net. Scatters food over growing area by hand or using blower. Wades in water or drives boat to harvest area. Collects marine life, using gill net, brail, shovel, or tongs. Rigs and lowers dredge baskets, using block and tackle, and raises to empty catch.