"Well, basically I can, like... absorb oxygen from the water around me. Like a plant takes nutrients from water. Again, it's just a natural thing for me, I don't think about it. It's like breathing to anyone else, you understand?" He was trying to think of the best way to describe something that he never really had to think about. How can you explain to an alien how to breathe or blink or yawn? This was as close as he could get.
"And in that case, meet me under the bridge at noon the day after tomorrow, okay? There's a small jetty there, we can begin diving from there if that sounds good?" Ibari had been there a few times by himself, just for a casual swim when the weather became too hot. It was peaceful, and aside from the occasional boat the only sounds were the waves and gulls. It was a good place to be.