Exhibit 21

Omega Protein Corporation owns 100% of the common stock of:

– Protein Finance Company, a Delaware corporation

– Omega International Distribution Company, a Delaware corporation (formerly named Omega Net, Inc.)

– Omega Shipyard, Inc., a Delaware corporation

– Zarpe Trading, Ltd., a Barbados corporation (inactive)

– Zapata Protein International, a Cayman Island corporation (inactive)

– Zapata Inversiones Chile, a Chilean corporation (inactive)

– Omega Protein, Inc., a Virginia corporation

– Owns 1% of the equity of Omega Protein Mexico S. de R. L. de C.V., a Mexican corporation (“Omega Protein Mexico”)

– Omega International Marketing Company, a Delaware corporation

– Owns 99% of the equity of Omega Protein Mexico