Do fish need to chew their food?

I've always wondered the same thing! I've had fish before and I've noticed that they don't seem to chew their food like we do. It's interesting to think about whether or not they actually need to chew. I've observed my fish when I feed them, and it seems like they just gulp down the food without any chewing action. But then again, different fish have different diets, so maybe some fish do chew their food in their own way. It's a mystery that I still haven't been able to solve.