A big recall is hitting Costco as Western United Fish Company pulls 3,314.7 pounds of Kirkland Signature Ahi Tuna Wasabi Poke from shelves. Testing found possible Listeria in the green onions, impacting stores in 34 states. "We are continuing to work with our green onion supplier to determine root cause," said Western United Fish Company to The Hill. The supplier found Listeria monocytogenes during routine testing on September 17th. Based in Kent and Redmond, Washington, this big company makes fresh and frozen poke for stores and businesses across the country.