User blog comment:Xenodrone98/If you can add any biome into subnautica collab/@comment-6020917-20160927164107

Biome; Shallow Trenches, a collection of eroded gullies in shallow water. Each gully is about 5m wide average, with extremes in either end (from deep cracks less than 10cm wide to real shallow broad riverbeds over 30m wide)

Description; Once a landmass located only 10-20m above surface level, it was heavily eroded by unusually long periods of heavy continious rainfall. Tectonic subsidence eventually brought it under the waves once more, where shallow sea lifeforms then quikly stepped in and began to colonize the new biome. Old land lifeforms either died off or underwent rapid/forced evolution, with great mangrove trees colonizing the highest and most level plateaus between the trenches. Colourfull coral quickly became abundant, profiting from the sheltered shallow waters that provided protection against currents and ample sunlight.

Creatures; Clow Pincher (scrapped creature, see concept art), Peepers, Shuttlebugs, Spadefish, Holefish (mainly live between the cavernous rootstructures of the mangrove trees), Bleeders (hunt in the mangrove sections), Stalkers (only in the deeper and broader trenches, where lifeforms congregate to migrate from place to place), Sandsharks (only in the unforested plateau-sections, where they mainly rest and gather for mating/social interaction), Skyrays (nest in the top of the mangrove trees, ocasionally drown and provide food for Bleeders).

Flora; Mangrove Trees (use the model of the light-gray luminescent trees on the Floater Island), Bulbo Trees (in the centre of mangrove tree groups, where acumulated biomass has enabled small hills above the water), Ming Vases (subspecies, readjusted for survival in knee-high water, dotted between Mangrove Trees), Purpe Brain Coral (very abundant, provide extreme amounts of oxygen in local tide-shallows), various colourfull corals, Purple Rattlers/Pink Mushrooms (grow on Mangrove Trees and bulbo islands), ...

Interactions; Creatures swarm in the presence of predators and divide between Mangrove Tree root-systems when predators congregate. Clown Pinchers are the cleaners of the Mangrove roots, picking them clean of litter and algea - Spadefish and Shuttlebugs do the same to the seabed and trench walls respectively, clear water is direct effect. Shade is abundant near the Mangrove Trees, making stunning displays of bioluminesce quite obvious even during noon - creatures swim to light when safe and away from light when threatened. Sandsharks congregate in 1 spot, a sort of sandshark cemetery, where large bones litter the floor and are clearly visible from the surface - an extremely old and large sandshark sleeps somewhere, only visible by an algea-encrusted weathered dorsal fin.

More info tba...