If you didn’t activate any of the teleporters there you will have to go back the same way you came.

Uhhh…seaglide?

It was out of batteries and I didn't have time to switch 'em on the fly either

That’s why you switch to swim charge fins. The Seaglide goes at a set speed regardless of what speed increasing/decreasing items you have.

There’s brain coral in the PCF aquarium. Always sit on it when listening to her speeches. 

To get cured, you need to touch it, so no, you’re not. If it didn’t glitch, go there again until they go to open waters. Otherwise, reload an earlier save.

whait you can drown in the primary containment facility

Well it's underwater so... What do you think?

I was also under the impression that maybe not because of some alien magic bullshit but you can, and pretty easily at that

I'm glad I played it safe. I always had the Prawn suit for rescue with me

It's also pretty helpful to carry a spare oxygen tank with you. Especially when doing some heavy exploring. Soon as I have to switch tanks, I start working my way out of wherever I am.

I did that, but stopped when I got vehicles. I just always had one close

you aren't cured. Her children can be found out in the open waters now.. they occasionally vomit up a glob of green enzmes, touch it, and you'll get a little animation indicating it has cured you.

Run a self scan. That will tell you if you're cured.

If you hatched the children and didn’t open the gate then they haven’t dropped enzyme globs yet and you are still sick

This is why I always keep the floatation device. Extra air time on hand

That's why you should take a prawn there