Shrimp producers worldwide will find out Tuesday whether preliminary import tariffs imposed by the United States will be upheld as the US International Trade Commission holds a hearing for the final phase of the duty investigation of frozen warmwater shrimp imports from seven countries: China, India, Thailand, Malaysia, Vietnam, Indonesia and Ecuador.

It will decide whether the shrimp imports are causing “material injury” to domestic producers. The seven countries exported more than 984 million pounds (446,335 metric tons) of shrimp worth nearly $4.3