Diary of a Mermaid

Dear Diary,

Today was awesomely scary when I visited the Dark Cave for my very first time. I thought it wouldn't be terribly dangerous or scary, but I realized that the permission slips meant something.
Well, when I arrived to the Dark Cave, I was wearing my special night black shells and draped see-through black seaweed on my sparkly green tail.
I entered the gloomy cave, after I gave my slip to the octopus who floated sullenly above the grey soft seabed. The dull and endless darkness stretched continuously in front of me. I was all alone.
Suddenly, I heard a clanking noise. I froze. I tried to spot what the noise was coming from.
Then to my horror, my inner terrifiedness was revealed and I was frantically swimming and retracing my steps back to where I came from. The clanking noise that sounded very similar to metal clashing together, came closer and closer...
I was extremely happy and glad that I had made it out of there.
Gasping for oxygen, I strobed my thick red hair and tried to get my breath back. The black, creepy and very ugly octopus watched me.
"Turn around." it said miserably. 
Slowly, I turned around. 
At that moment, my emotions were mixed with happiness and horror, for there standing was an army of decaying skeletons in Roman armour, at the very brink of the entrance of the cave, their heads nodding in the misty water.
"Oh, my!" I exclaimed, and blur, and I swam, my tail a blur, and never came back there again.