Nurse shark

You (whoever you are) are always at sea. You're surrounded by fish, including sometimes sharks. One day, a male shark approached you. He didn't look threatening or anything. It seemed he had a reason for coming. A fishnet was stuck in his fin and he couldn't get it out. And you decided to help anyway, because you're kind, right? The shark didn't know how to thank you and confidently approached you, looking at you with such gratitude.