A sorta shark-like corrupt Gem living in the deepest depths of the oceanic abyss near Teal Diamonds base. She’s basically the biggest ‘fish’ to be found as she’s larger than Mermaid Teal Pearl and large enough to be quite frightening. Thankfully, she can’t stay out of water for a long time. She can rarely be seen on the surface water but mainly stays in the abyss.
Her size mostly comes from an Origin Shard that wasn’t took from her and has grown from it’s small size to a larger piece stuck in her tail. It’s power still is being used by her. Presumably removing it would cause her to return to a reasonable size. But good luck with that!