Originally Posted by m chappelow
natural ones such as Red -tide algie blooms that can occur at certain times causing paralytic shellfish poisoning to humans ,
Which is why you should not eat shellfish unless there is an "R" in the month. Red tide/Algae blooms only occur in the warmer months, and in certain areas, but as a general rule if there is an "R" in the month it should be safe from PSP toxins, but then there is no knowing what else might be in the water
Just as a thought though, Being Bi valve feeders, if there is no Shite in the water then there is nothing for them to feed on? Hence the need to cook them well.
So where the water is very clean and very little sediment, then very few mussels.
Same for oysters etc. Think on that as that raw Oyster is sliding down!