U.S. customs inspectors at Los Angeles International Airport seized a shipment of several dozen live giant African snails, considered a delicacy in Nigeria but also voracious pests that can eat paint and stucco off houses, officials said on Monday.

Weighing nearly 2 pounds (0.9 kg) each, including their shells, and measuring about 6 inches (15 cm) in length, the 67 snails arrived from Lagos, Nigeria, in two plastic baskets with paperwork describing them as being for human consumption, the U.S. Customs and Border Protection agency said.

The mollusks appeared to be packaged as a personal shipment and were marked as destined for an address in San Dimas, California, about 30 miles (48 km) east of Los Angeles, agency spokeswoman Lee Harty said.