Here is your translation:
Still not quite used to using a fishtail.
Even while swimming underwater, Xiao Jinsheng still retained the habit of walking with legs on land.
As a result, her fishtail swayed close to the golden-white seabed.
With every flick of her tail, ripples stirred in the water, brushing against a patch of soothing coolness.
Xiao Jinsheng paused her swimming motion, hesitating before letting her tail graze the seabed again.
What she touched felt oddly familiar.
Startled, she lowered her gaze and saw Shi Xie curled up alone on the sand, his fishtail tucked in, hugging his arms as his body trembled.
His complexion was pallid, completely devoid of color.
"Shi Xie!" Xiao Jinsheng called out anxiously, rushing over and pulling him into her embrace.
"Shi Xie, what's wrong with you?" she asked urgently, channeling Healing Element energy into him without ceasing.
"Don't worry about me," Shi Xie waved her off, pushing away her touch.
