Week 3
The Week 3 Ecosystem page lists all biomes extant in Week 3 and which organisms are present in each.
Maps
Map of Week 3 Biomes
Map of Week 3 Topography
Map of Week 3 Regions
Map of Week 3 Rivers
Map of Week 3 Watersheds
Map of Week 3 Caves
Events
Extinctions
Between Weeks 2 and 3, the Cish Plague wiped out all extant cish except the Snoodcish: the Devilcish, Ghost Cish, Gulper Cish, Greenscale Cish, and Sandcish perished. It also weakened Carpotesta Devoratori and Protodevoratori so much that they succumbed to outcompetition by their descendants, which had better immune systems. With its main hosts gone, the cish plague itself then went extinct.
The Kralptus went extinct due to the loss of the Darwin Desert. The Octocrystal went extinct because it was too large to cope with the permafrost in its environment.
Binucleusdetritivorus Thornworm, Binucleus Crystal Shrub, and Laminato were outcompeted by their more successful descendants. The Crystalsucker went extinct due to the loss of its food source.
Dispersal
Several species spread across narrow bodies of water, while others were transported across the ocean by its currents. Here is a list of species that spread this way and where they ended up:
Toxitrop: Termite Tropical Rainforest
Dwarf Mycostrum: Termite Tropical Rainforest, Darwin Tropical Rainforest
Terra Grove: Termite Tropical Rainforest, Snow Subtropical Woodland, Termite Tropical Beach, Squid Tropical Beach, Snow Subtropical Beach, Leopard Temperate Beach
Treecrystal: Termite Tropical Rainforest
Mycostrum Knightworm: Termite Tropical Rainforest, Darwin Tropical Rainforest
Pale Mycostrum: Squid Tropical Savanna, Hydro Tropical Savanna
Crystal Fortress: Squid Tropical Savanna, Squid Subtropical Woodland, Leopard Temperate Woodland
Purplebract: Squid Tropical Savanna
Landfall Detriti: Squid Subtropical Woodland, Termite Tropical Beach, Squid Tropical Beach, Leopard Temperate Beach, Darwin Tropical Rainforest
Rupee Tree: Squid Subtropical Woodland, Snow Subtropical Woodland
Rubyshroom: Snow Subtropical Woodland
Thanos' Shrub: Snow Subtropical Woodland
Upshroom: Leopard Temperate Woodland
Wormrot: Termite Tropical Beach, Squid Tropical Beach, Darwin Tropical Rainforest, Darwin Subtropical Woodland
Tidal Dangleweb: Termite Tropical Beach, Leopard Temperate Beach
Gobbob: Leopard Temperate Beach
Silvatrop: Darwin Tropical Rainforest
Crystal Peridot: Darwin Subtropical Woodland
Network Peridot: Hydro Tropical Savanna
Armored Krelp: West Glicker-Barlowe Tropical Beach
Crystal Dome: West Glicker-Barlowe Tropical Beach
Pine-Legged Dwarf Gazebo: Ovi Taiga
Yokto Stemleaf: Talon-Orpington Tropical Beach
Double Stemleaf: Talon-Orpington Tropical Beach
Wormwort: Fermi Subtropical Woodland
Tidal Leafstar: East Dixon Subtropical Beach
Common Flutterworm: West Glicker-Barlowe Tropical Coast
Krelp: West Glicker-Barlowe Tropical Coast
Horn Nautstar: West Glicker-Barlowe Tropical Coast
Crimson Saddlebug: West Glicker-Barlowe Tropical Coast
Darwin Octocrystal: Leopard Temperate Coast
Mudworm: Leopard Temperate Coast
Barlowe Ferrumcarcer: Drake-Ovi Polar Coast
Crystalmat: Drake-Ovi Polar Coast
Shovelface: Drake-Ovi Polar Coast
Anchored Cryosagania: Hydro-Barlowe Polar Sea
Cryofrond: Hydro-Barlowe Polar Sea
Drake Mosshroom: Hydro-Barlowe Polar Sea
Vailnoff Mats: Talon-Orpington Tropical Sea
Tentacle Crystal: Talon-Orpington Tropical Sea
Triparmo: Squidy Tropical Sea, Squidy Reef
Carpetesta: Squidy Tropical Sea, Squidy Reef, West Hydro Temperate Coast
Scrapercell: Squidy Tropical Sea, Squidy Reef
Swarming Detritustar: Squidy Tropical Sea, Squidy Reef, West Darwin Subtropical Coast, West Hydro Temperate Coast
Stickymoss: Squidy Tropical Sea, Squidy Reef
Eyestar: Squidy Tropical Sea, Squidy Reef, West Hydro Temperate Coast
Hinged Shellstar: Squidy Tropical Sea, Squidy Reef
Segmolixo: Squidy Tropical Sea, Squidy Reef
Indigo Blight: West Dixon Subtropical Coast
Binucleusphotoedo stringi: West Dixon Subtropical Coast
Beachadora: West Dixon Subtropical Coast
Skarlix: West Dixon Subtropical Coast, West Ovi Temperate Coast
Protopathogena vira: West Dixon Subtropical Coast
Protoviramoeba biolumina: West Dixon Subtropical Coast, West Ovi Temperate Coast
Three-Kernel Detriti: West Dixon Subtropical Coast
Rombusi Cerberesi: West Dixon Subtropical Coast
Stickerstar: West Dixon Subtropical Coast
Caltrop Crystal: West Dixon Subtropical Coast, West Ovi Temperate Coast
Haircrystal: West Dixon Subtropical Coast
Predestar: West Dixon Subtropical Coast
Horrorstar: West Dixon Subtropical Coast
East Glicker Mosshroom: West Dixon Subtropical Coast, West Ovi Temperate Coast
Greim: West Dixon Subtropical Coast
Vinagoblet: West Dixon Subtropical Coast, West Ovi Temperate Coast
Interweb: West Dixon Subtropical Coast, West Ovi Temperate Coast
Thornant: West Dixon Subtropical Coast
Chambered Siluro: West Dixon Subtropical Coast
Freshwater Photosagnia: West Darwin Subtropical Coast
Wormstem: West Darwin Subtropical Coast
Violetweed: West Darwin Subtropical Coast
Quataetar: West Darwin Subtropical Coast
Crystalgrazer: West Darwin Subtropical Coast
Colony Grappler: West Ovi Temperate Coast
Protopathogena crysta: West Ovi Temperate Coast
Binucleusdetritivorus corymbi: West Ovi Temperate Coast
Leafstar: West Ovi Temperate Coast
Five-Fingered Crystalblight: West Ovi Temperate Coast
Crystal Bush: West Ovi Temperate Coast
Clingowhexia: West Hydro Temperate Coast
Compass Litusfoi: West Hydro Temperate Coast
Wandering Shellstar: West Hydro Temperate Coast
Wright Mosshroom: West Hydro Temperate Coast