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11 The Coral Gardens is a biome on the ocean moon in Subnautica 2. It features extensive coral reef formations and is one of the larger biome areas on the planet, with at least two identified sub-biomes: Dolerite Spires and Graveyard Spires. The biome name was discovered by community members who spotted file names visible in the background of a dev vlog video.
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33 Sub-Biomes
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55 File names from the dev vlog footage revealed two sub-biomes within the Coral Gardens:
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88 Sub-BiomeWhat the Name SuggestsDolerite SpiresTall, columnar rock formations made of dolerite, a type of dark igneous rock formed from cooling magma. The name suggests dramatic vertical terrain with dark-colored geological pillars rising from the seafloor amid coral.Graveyard SpiresThe "graveyard" designation suggests an environment featuring the remains of large creatures, skeletal structures, or ancient formations among spire-like rock columns. This could be a darker, more foreboding section of the Coral Gardens.
99 These names come from development file names and may not represent final naming. The sub-biome structure suggests the Coral Gardens is a diverse environment with distinct zones rather than a uniform coral field.
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1111 Environment Design
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1313 Dev Vlog 2 ("Building Unknown Worlds") showcased the environmental design process for the ocean moon's biomes. Senior Environment Artist Ben Hale and his team use custom tools to create natural-looking terrain:
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1515 MeshBlend: A custom tool that eliminates visible seams where 3D assets meet, creating seamless transitions between coral formations and rock surfaces. Hale described the tool as "black magic."Tufa Kit pipeline: A specialized pipeline built with Substance Designer and ZBrush for creating realistic rock formations. Individual rock assets can reach nearly one million polygons for ultra-detailed seabeds.
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1717 Like all biomes on the ocean moon, the Coral Gardens is entirely handcrafted rather than procedurally generated. Level Designer Artyom O'Rielly stated: "Each zone is thought through and designed by hand." Every terrain feature, resource node placement, and creature spawn point is deliberately positioned by the development team.
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1919 Among the predators that range across the Coral Gardens region is the Marrowbreach, a shark-like hunter confirmed in the live build (a June 1, 2026 patch increased its damage and spaced out its attacks). Community documentation describes it patrolling the shallower coral flats and the Graveyard, where a larger, more aggressive variant is reported, and pairs it with the Houndgar, a small squid-like partner that flushes and dazzles prey for it. The same patch rebalanced the Nibbler Mango, a mid-sized pack hunter endemic to the region that circles divers in pairs or threes before attacking. All three species are scannable, with databank entries documented in community sources.
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2121 What Remains Unknown
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2323 Depth range and placement in the ocean moon's progressionSpecific creatures inhabiting the biomeUnique resources available in the Coral GardensWhether the Blight affects this biomeVisual details of the alien coral speciesSpecific differences between the Dolerite Spires and Graveyard Spires sub-zones
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2525 Named Pockets Within The Region
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2727 Beyond the documented sub-biomes, the wider Coral Gardens region is split into a number of smaller named pockets that map sources describe as distinct exploration areas. These include Anemone Hills, Blighted Coral, Graveyard, Leadzone, North Raceway, South Raceway, Plateaus, Shallows, and Tufa Towers. The pockets vary in fauna density, terrain shape, and resource access, and the wider region is currently the densest fauna biome in the live build.
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2929 The Coral Crab is one of the signature predators of the wider region, with discarded shells visible across the landscape between pockets.
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3131 Coral Crab Activity And The Dolerite Spires
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3333 Within the Coral Gardens region, the  sub-biome is the most consistently documented habitat for live  specimens. The  sub-biome, by contrast, hosts a concentration of bleached, post-mortem Coral Crab shells and bones whose origin is not yet explained in the current Early Access build. Players exploring the Coral Gardens for  BioMod scanning material should prioritise the Dolerite Spires; the Graveyard mainly offers lore-flavor exploration rather than scannable live specimens.