The snails, which are precluded in the US, were found by Customs and Border Protection (CBP) inspectors at Los Angeles International Airport.
They arrived from Nigeria and were intended for a person in California, verbalized Lee Harty, a spokeswoman for the customs agency.
The molluscs are among the most sizably voluminous land snails in the world and can grow up to 8ins (20cm) long, verbalized officials.
The US Department of Agriculture put the snails in an incinerator after they were inspected, verbally expressed Harty, because they can carry parasites that are deleterious to humans, including one that can lead to meningitis.
They are withal potentially damaging to nature, verbally expressed Maveeda Mirza, the CBP programme manager for agriculture.
"These snails are solemnly inimical to local plants because they will eat any kind of crop they can get to," verbally expressed Ms Mirza, who integrated that investigations were perpetuating into why one person would optate so many.
"We're investigating what transpired, but it doesn't seem homogeneous to there was smuggling involved," she verbally expressed.
This is the first time that they have confiscated such a sizably voluminous quantity, she integrated, albeit there have been cases of much more minute numbers being found to be fortuitously in people's luggage.