@WizardOfDocs
Okay, so, this is the kind of no-perfect-answer question I just adore, so even though I’m not watching the JLtG videos Imma answer.

Opposite of lobster as a food item: I woudl go with a jalapeno pepper. Instead of subtle umami softness inside a crunchy shell, it’s hot & spicy & soft outside around crunchy seeds.

For lobster the animal: I like Newfie too, but I think a chinchilla is even more opposite, being maximally fluffy and soft but also so very harmless.