Some are common knowledge, but others may surprise you.
Food taboos exist everywhere in the world. There are different reasons why some products and ingredients are prohibited in cultures. Many practicing Jews abstain from non-kosher diets; Islamic law prohibits food items that are not halal; Jains don’t eat meat and root vegetables (potato, onion, and garlic). In some cultures and tribes, children and menstruating and pregnant women have restrictions, while during events such as weddings and funerals or Lent and Navratri, people may also refrain from certain foods. And then, of course, there are environmental and empathetic reasons.
These taboos are not created equal. In this list, we are discussing food taboos around the world and the reasons they exist.
The shark meat is very tasty, however it might also be full of mercury too, similar to tuna or other big fish which consume other fish but live long enough to harbour the accumulation of this poison... Shark finning is attrocious, but so is any poaching as none of it is done humanely anyway...