Do you know what freediving is? Normally people think it’s diving; and therefore you need a certification, and special equipment such as an oxygen tank. However, freediving is completely different. You don’t need any special equipment, just a mask, a snorkel and fins.
In my opinion, one of the advantages of freediving is more flexibility than in scuba diving. You can do somersaults like dolphins under the water. And you can take photos like a model, because the equipment is much smaller than in scuba diving.
On the other hand, freediving has its dangerous points. For example, you can’t breathe under water as you might be black out. Don’t be alone when you go freediving. You should go with someone else.