She felt somewhat bad for startling him. It's obvious he hadn't expected to see her, which was a good thing. She doubted anyone could fake his level or surprise that convincingly. She gave a flick of her tail at the beginning of his question as if that would explain the what part of it. When he corrected his question she rested a hand against her chest before she considered and answered him with a human name, "Marinette."

Mer had their own language and it wasn't her real name but she knows that he wouldn't be able to say it - since Mer language was part fish and no human could possibly mimic them properly. Marinette was fine. It was a name she'd used before. At his question about Gabriel her expression soured and she gave a firm nod, pressing a hand up against the glass wall of the tank. "I think he is after magic or jewels ... something. He's a greedy human."

She peered at him, now that she's closer she can see that he looks almost nothing like Gabrien. Gabriel is a pale kind of fair, Adrien is bright and warm - the energy around him is vibrant if a little clouded; Gabriel's doing she has no doubt. "Adrien.." She smiled shaking her head. "Not your fault."

She paused. "You seem as trapped as me.."