MEXICO CITY (AP) — Mexico's environmental protection agency says another endangered porpoise has been found dead in the upper Gulf of California.

The office says the adult female vaquita marina was found Sunday in waters of a marine reserve about 16 miles (26 kilometers) north of San Felipe, Baja California state.

The agency said Monday in a statement that the porpoise was in an advanced state of decay but had deep stabbing wounds as well as slashes consistent with the cutting of nets around the animal.

The vaquita population has been dramatically reduced by illegal net fishing for the totoaba, whose swim bladders can sell for thousands of dollars in China. Only about 30 of the reclusive porpoises are believed to remain in the gulf, also known as the Sea of Cortez.