Tony shut his eyes and thinks about changing back but the fin stayed and he opned his eyes and groaned in pain 'Ok I need some water, fish need water loki"
Tony slides into the bathtub and almost seemed to purr as the water ran over his tail and smiles 'ah much better" he said and looked at Loki "don't you have aspell that can change me back?"
"I don't know... thought if you were dry........" he sighed and punched wall. "So diffcult... jeez mermaids so diffcult... why not vampire or werewolf or something else I had better plans to know how to hide."
Tony blinks 'Oh so you rather have me be a bloodsucker and bite you or werewolf and rip your lugs out ?" he asked bemused smiling and then sunk into the water head under smiling. He could be under for a long time
"Well I don't know... I don't know what to do with hiding a mermaid tail or fixing any of this... i didn't even think ,mermaids existed." The Doctor mumbled.