First of all, the role of walrus tusks
Walrus teeth play a great role and have certain economic and medicinal value. In the Middle Ages, walrus teeth were ground into powder and used as important medicinal materials. And because of the great value of walrus teeth, walrus was captured by some people who were blinded by money, which brought great disaster to walrus. In the 20th century, there were few walruses left in the world, especially the shrinking sea ice area in the Arctic Ocean, which affected the growing environment of walruses, so the survival of walruses became more and more difficult. Walrus' teeth can help walrus walk on roads and ice. If there are prey in the sea, walruses can also subdue their prey with their tusks. But walruses don't catch fish with their tusks, because walruses don't like to eat fish, but walruses like to eat some mollusks, so their tusks can directly pierce mollusks, such as squid.
Second, the role of ivory.
Presumably, when many people talk about elephants, they have elephants with tusks in their minds. In the past, elephants had to fight to get their prey, so ivory was also a weapon for elephants to fight, because other teeth of elephants were not particularly developed, especially because they only had six molars in their mouths, so they could only chew food and could not attack their opponents. Bian Xiao believes that elephant tusks are now used to remove debris from the ground when looking for plants. Because the elephant's teeth are curved, it is very convenient to clean up the debris.
Finally, if elephants lose their ivory, they may die, especially for some wild elephants. If the majestic tusks disappear, many animals may attack these elephants, which have no backhand strength. Most importantly, elephants' tusks are more likely to be favored by females.