What is a one-word opposite of "submerged" in the physical sense

I'm looking for a one-word opposite of "submerged". The context is a study where I'm looking into species that live below the surface and thus can be conveniently labeled as "Submerged" in my plot. However I can't find a good word to describe those found living on the surface (of a peat bog).

Emerged or surficial(?) comes to mind but since I'm not a native speaker I'm not too sure that I can use it that way.

Solution 1:

The word Turf animals or Turf could be used to describe something that is related to Ground/Land. Apart from Turf, Terra-firma could be used which means Ground.

Solution 2:

Perhaps "afloat" would do, though its colloquial hue may not fit well in a scientific study.

Solution 3:

Try surface, as in surface creatures. -- Cambridge

adj. 1. working or operating on the top of the land or sea, rather than under the land or sea, or by air

Or maybe, surfaced, as opposed to submerged -- ODO

adj. 2. Having risen or come up to the surface of the water or the ground
"A gull will land on the back of a surfaced whale and rip at its flesh and blubber."