A fish out of water

This took me ages to write about, as it's such a diverse topic...

The Melbourne aquarium echoed with all the sounds of a school ground: Hysterical girls shrieking, obnoxious boys laughing and jeering, and frantic teachers attempting to put everyone in there places with ' Don't touch this!' And don't do that!'s. The field trip was certainly not going to the teachers plans, though it was exactly how Melanie had expected it to be.
She sighed, half listening to the tour guide droning on about the feeding of the fish and the cleaning of the aquarium, while watching the tropical fish swim listlessly back and forth in their over-sized goldfish bowls. How they could truly be called tropical in the Melbourne Aquarium is anyones guess.
Gazing at the turmoil around her, Melanie couldn't hold off the feelings that she really didn't belong. She didn't shriek and giggle with the girls or tap the glass with the boys. She wasn't even listening to the tour guide or the teachers, like the more attentive students. Sighing again, she turned from the fish tank, only to come face-to-face with a Great White Shark that had just swum into the one opposite. The girls began screaming as, one by one, they spotted the newcomer, and the braver, or stupider, depending on your point of view, of the boys began tapping the glass in an attempt to anger it enough that it would attack.
The guide, who seemed rather tired, finally noticed where everyones attention was, and began a monologue on, in his words, 'The great Killing Machine of the oceans.'
But Melanie was not paying any attention to any of this, for her gaze was fixed on that of the sharks. He, for she knew that it was so, seemed to be trying to tell her something, his sorrowful eyes attempting to convey some message through the reinforced glass that was his prison.
'I can't help you.' She whispered to him. 'I'm sorry...'
He continued to stare, uncomprehending.
How could anyone call you a killing machine? She thought sadly. Why are you and your kind portrayed as so evil?
'I'm sorry.' She said again, begging him to understand. 'You shouldn't be here, but I can't help you.' She felt about to cry. 'You're like fish out of water here, aren't you? You don't belong. None of you do.' She added, addressing the entire aquarium. 'But I can't help...'
His gaze enveloped her, and she felt herself rushing downwards, into another world, another body...

The scent of blood in the water, the thrill of the hunt. Gliding swiftly, smoothly through the water, parting the silvery shoals of fish. The water filtering through her gills, cool and clear. An object rising from the gloom before her, somewhere in her mind she recognises it as an open cage. The scent comes from inside, she swims in. To late, her human mind thinks Trap! And she spins around, only to see the cage door swing shut.
A diver points something at her, and she feels a dart pierce her side. Then all is darkness as she is knocked cold.

'Melanie? Hello? Earth to Mel!'
Melanie shook herself, and opened her eyes to see the shark swimming away, tail swishing from side to side.
'Daydreaming, eh?' Said Rae, perhaps her only friend at school. 'C'mon, everyone else has moved off!'
'Oh, yeah... Sure.' She allowed herself to be guided away by the elbow, casting a glance over her shoulder to the sharks retreating back.
'Goodbye.' She whispered, and he turned.
She felt a presence touch her mind, and smiled as she felt him say; 'A fish out of water. Like you.'
'Yes.' She murmured. 'like me.'