Not upset. Just correcting you. Bugs are hemiptera, which is an order of the class insecta. Lobster is not in that order and it's not even in that class. If you say "scientifically" then you're especially wrong.

'Bugs' is also an idiom for arthropods and it's pretty clear from context that this is how the word was being used. I understand some people have more difficulty than others picking up on idioms but that's no reason not to take all the poetry out of everyday speech. Linguistic drift is a beautiful thing! Just embrace it.