Jack Pendleton found a snakehead, the size of the end of his thumb, while eating Sunday at the T.G.I. Friday’s in Clifton Park, N.Y. The chain restaurant said it regrets the appetite-killing error. Pendleton said he has no plans to sue.

Pendleton, doing what all consumers should do to hold suppliers of food accountable, snapped a photo with his cellphone camera, then summoned the waiter.

Amy Freshwater, a spokeswoman for the chain, said in an e-mailed statement the company is trying to determine what happened.

"We are taking this situation very seriously. We immediately pulled the broccoli from this restaurant and began an extensive investigation. As a precautionary measure, we pulled broccoli from all restaurants that received product from this supplier. We have since isolated the specific lot date of the broccoli in question and have now reintroduced the product in all restaurants not included in the product hold."