If you eat me, my sender will eat you. What am I?

Common Wrong Answers
“A fish”
While a fish is related to the riddle, it is not the answer because it does not represent something that, when eaten, would cause harm to the sender.
“A berry”
Berries do not have a sender that would eat you if you consume them, making this guess unrelated to the riddle's context.
“A sandwich”
A sandwich does not imply any threat to the sender upon being eaten, conflicting with the riddle's premise.
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