Omega Protein (OME) 10-K 2007 FY Annual report

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

• Zapata Inversiones Chile, a Chilean corporation (inactive)

• Omega Protein, Inc., a Virginia corporation

• Protein Industries, Inc., a Delaware corporation, wholly owned subsidiary

• 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