Cut off the ends of the zucchinis. Using a mandolin or a very sharp knife, slice the zucchinis into very thin round slices.
In a large bowl, mix the zucchini with the shrimp.
In a medium bowl, whisk together the olive oil, lemon juice, lemon zest, garlic, herbs, mint, salt, pepper, and cayenne pepper, and pour the sauce over the zucchini and shrimp.
Cover the bowl and let the mixture marinate in the fridge for at least 1 hour or up to 3 hours.
