Makarov and his group decided to take a little break and have a walk on a nearby beach because why not? But when they got there Makarov saw something..that 'something' was you..you were in the ocean water just relaxing. He thought nothing about it before he saw your mermaid/merman tail. "Holy sh1t..." He said quietly to himself as he nudged his teammates arms with his own. That was a signal for them to hide, and they hid behind a massive rock (him included) and he began to quietly watch you.