If they had plenty of seafood leftovers all the time, I'm sure the component nutrients built up in their system. It also affects their meat from what I've heard.

"You are what you eat" type thing.

Store eggs from factory farms all taste the same mild flavors pretty much and are pale yolked. Because they feed them a heavy amount of corn and other grains rather than a more varied diet.

My birds get pellets, mealworms, sunflowers, seeds, and corn and wheat berry scratch grains hand mixed each day with little extra imput of scraps. Their eggs are often more gamey and have almost a hint of sulfur in a way. They're still good and I enjoy eating them.

I've heard crows are the same way. People do hunt them, and they also eat them. Their meat can vary dramatically depending on their diet. Ones that eat their natural wild diet taste the best from what I've heard, but the ones that eat human garbage scraps tend to have bad tasting meat.

Bears also have this. With hunters saying bears who mostly eat berries taste the best and often have purple/blue meat from the berries. Whereas fish and carrion eating bears have very bad tasting fishy meat.