I will try and find out the details for those people with this bent. But for the moment see the seafood through the eyes of a fairly knowledgeable biologist who is both thrifty and adventurous when it comes to seafood. Also be aware that I will try almost anything, but I will not eat any seafood that has any signs of age, from tasteless to rancid. If it does not taste good, don't eat it. I have never suffered from eating bad seafood because I will not eat it.
Fresh seafood is delicious.
If what your are eating is not good, do not eat it. First and foremost, bring a jar of prepared horseradish. It is crucial to my enjoyment of many types of shellfish from shrimp to clams. It just really isn't the same. And the cocktail sauce or juice that they make here with V8 juice and chopped veggies is appalling.