Turbid

Muddy, having the sediment disturbed (adj.)

Billy waited, squatting in the brook. His head was down and focused, hands at the ready, his reflection bobbing and waving in the trickles and waves of the small stream as it ran over rocks and sticks. He watched a small oval area where the water was calm, little sparkling crystals of sand and sediment laying the floor of the tiny pool. He could see every shadow, every pebble, every crevice of the pool. His eyes searched them with a regular rhythm.
"C'mon Billy," said an annoyed female voice.
He ignored it. It kept talking.
"Billy, stop being such a poser, you're not outdoorsy."
He didn't move or say anything. He didn't want to. The pool was so calm and clean and clear that he thought that even his voice might disturb his pursuit.
"What the hell, why aren't you saying anything?" the voice demanded.
Then Billy heard footsteps clumsily cracking sticks and swishing branches. The body that belonged to the annoyed voice stood at the edge of the stream. He looked up at his twin sister Christyn standing there, glaring at him, obviously desiring the attention he was giving the water. Billy raised his finger to his mouth and shushed her.
"What are you doing?" Christyn asked.
He looked at her. She disrupted every peace he had ever tried to attain. He tried to be patient with her.
"Mud puppies," he whispered, eyes on the stream, "very hard to find, you have to be very still if you want to see them."
"What? What are you talking about? Mom and Dad are waiting."
Billy closed his eyes, took a breath to try and cope with her, and kept his head down to water and his hands out.
Christyn shook her head, looked around, and sighed. Then she took a big step forward and her foot landed in the center of the calm little pool, splashing droplets of water on Billy's knees as she walked by him. Billy didn't do anything at first. Then he nodded and took a deep breath and closed his eyes. He opened them and looked down at the pool and he saw a turbid cloud of dirt and dust in the middle of it, blooming in the sunlight and blocking anything in the once-peaceful ecology from view. He dropped his hands to the ground and pushed himself up angrily, thoroughly disturbed, and walked in the direction of his family.