Now, your marine biology question is not only a very good question, but a very interesting one to boot. Growing up by the ocean, and having a father who worked on fishing boats, I've seen my share of big sharks up close. I also spent many years in the Florida keys, and was privileged to see some amazing sharks in thier natural habitat. Hammerheads. Mako. Nurse. Black tipped reef sharks, as well as rays, turtles, alligators and crocodiles.
Sharks are truly amazing creatures, dinosaurs of the modern world. Unchanged for hundreds of millions of years. Sharks are perfect for how they act, and what they do. They are streamlined for stealth, speed and agility. Hunting machines.
That said, according to my research for your question, a sharks tongue doesn't seem to have much of a job to do. They rip and tear chunks out of fish, or eat them whole w replaceable teeth. A sharks tongue does, though, have a very cool name. It's called a basihyal. Remember that.
So, Read up on all things marine biology, an important job for a young man like you. Learn all about the seas and oceans. We've explored more of space then the oceans of the world.
Much to learn. Ask good questions, learn facts, do some field research, and have a blast with your scientific enthusiasm. Thank you for your question, Charlie. Well done.