New Zealand Food Safety has issued a public health warning against collecting shellfish from the Pelorus Sound area in Marlborough Sounds due to the presence of Paralytic Shellfish Toxins. The toxins have been detected at levels several times higher than the safe limit, posing an extreme risk to those consuming shellfish in the area. The warning advises against eating mussels, oysters, tuatua, pipi, toheroa, cockles, scallops, catseyes, kina, and all other bivalve shellfish from this area, as cooking does not remove the toxins.