Now that we are maturing paleo dieters, i've noticed the current conventional wisdom/idiocy will always state that a preferred nutritious animal food is always endangered, dwindling, too pollutive or too cute and pet like they want you to stop eating it.
"They" despise humans for eating:
Horse, deer, wild pig, tuna, whale, seal, elephant, dog, turtles, oysters, clam... Now they want you to stop eating all ocean life... Because its allegedly all got mercury... So they dont want you eating fish brains...
Think of other animals they dont want you to eat or have become extinct. Those may be the tastiest and most nutritious animals.