Macrophotography [ Caterpillars ]

Good morning everyone, greetings to all of us, May we always be given a healthy body, healthy mind so that all the hopes we want to achieve are achieved. This time I will share some pictures about caterpillars. I found this caterpillar sitting on the trunk of an old coconut tree, and I wondered why it only had 1 canine tooth. Is it true or is it broken or pulled out, I also don't understand