He comes across a cavernous room, containing what feels like a scale model of the solar system. If it wasn't for the ground beneath his feet, he'd likely feel as though he were floating amongst the planets.

Yeah whatever who cares where are the breathing masks.

Perhaps in Evan's maddeningly expansive walk in wardrobe?

Maybe! He'll look.

It's a vast collection of costumes for all occasions. Some of them are explosively powerful-supersuits. 

...ooh.

But he's here on a mission.

There are some breathing masks on a shelf next to some masquerade masks. Some of which would let him see through walls via sliding scale sonar, but they're not labelled. 

Ooh he grabs one and goes back to Michael.

"Poor, poor, diamond blood less humans."

"Let's just go."

He zips over to the beach.

"Why do you keep doing that? You know you'll have to wait."

"You could teleport and be faster than me."

"Line of sight."

"I have to have line of sight where I'm going too, that's just an excuse."

He teleports into the water then.

He follows.

Even without his supernatural powers, he's a genetically engineered transhuman designed from the ground up to be essentially good at everything. Picking up the basics of moving through water shouldn't be too hard.

It isn't.

Also, he doesn't need swim goggles to see clearly underwater, how about that.

...well that's mildly surprising but not too much, he'd never visited the ocean before.

The boys pass over a coral reef, alive with vibrantly coloured fish and alien looking growths. By the standards of many worlds, it would seem remarkably pristine, thanks to Earth Mira's relative lack of industry.

Charles is gleefully unaware of this.

Schools of fish spiral around them, forming startlingly geometric looking patterns.

Michael demonstrates how to properly kick off into the clouds of delicious, nutritious fish.

...he tries.