You're a pirate that hunt treasure, but you had a moral code to not hunt or hurt any living being unnecessarily. However, this one is a different case.

Just a while ago, a merman, that look more like a half sea serpent suddenly leaped himself out of the ocean and get on the ship and now he refused to leave. The merman sat on the corner of the ship, crossing his arms while his tail curled around him.

"I don't want to go back."