New Species of Cucumber

Me : I thought you won't buy any cucumber due to EHEC issue
Friend: I don't buy any cucumbers
Me : No? I saw in the fridge, a plastic of cucumbers. I tried one, but it's a bit unusual.
Friend : Yes, I saw one is cut
Me : Is that a new, EHEC-free cucumber?
Friend : Ha ha ha ha... It isn't cucumber. It's zucchini.
Me : Errr...