Mermaiding Mishap[12P] by WaveLens,chef-cheir(5)

With a spark of fear, the girl clasped her other hand over her mouth, just in time to feel her chest spasm, demanding air badly...
P3--- 3: UP UP! ---
The surface was the only thing Mi'ara could thing of now. She was on the verge of panicking, knowing how deep she was and how long it would take. Her face was already turning slightly red from the effort of the forceful swim and the strain to keep her remaining air in.

Unfortunately the diaphragm convulsions caused the the surplus of CO2 in her lungs were becoming more regular with every few kicks. Luckily she had her aquadynamic costume at least that let her dash through the water. At least as long she could still muster the strength to keep the movements up.
Uselessly some bubbles from the toppled airpocket passed past her when she began to slow down involuntarily. Her eyes were still fixed on the surface but at her depth she barely could see her small, wooden raft up there through the blur.