Alladoras

Enter Alladoras. A hypothetical planet orbiting the G-type star Amaterasu. Slightly larger, heaver and denser than Earth, it is remarkably similar to our planet in characteristics. Despite outwards similarities, it has a retrograde spin (it rotates in the opposite direction to Earth), its days are slightly longer (28.5 hrs) and its year is longer, as it is 405 days long. However, its most obvious difference from Earth is its surface: its surface is covered in far more water – around 95% of the planet's surface is covered in great seas. The only landmasses that are present, excluding the smaller islands around the equator, are the large northern island of Kryos and the only continent: Pisciaustra in the south pole of the planet.

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First, we will cover the islands. In the west, there is the archipelago of Eden in the Sapphiric Ocean. Eden is so called due to the size of the island, harbouring many terrestrial "plants" (or the planet's equivalent to plants, but for simplicity we will call them plants). It harbours a great diversity of life in the sea as well, with large reefs built out of the colonies of worm-like aliens called 'builderworms'. Eden also hosts 3 smaller islands towards the southeast, which have less reefs but large expanses of shallow carpgrass meadows, a seagrass-like plant. These environments are so prevalent in the equator that especially large meadows are known as equatorial savannahs. 

Moving northeast, we enter the Equatorial Triplets in the Lazuli Ocean. A relatively isolated triplet of islands surrounded by a sheer-drop off, making it comparatively more isolated compared to other, nearby islands. Unlike Eden, which is surrounded by both builderworm reefs and carpgrass meadows, the Triplets are surrounded by an ancient barrier reef. Many species that live here are also endemic to the barrier reef or frequent it. The northern region is well sheltered, and serves as a nursery for certain northern species.

Further in the east, we enter a massive archipelago, the largest in the planet. Ichthyonesia, the archipelago of fish. Boasting an immense diversity of reefs and carpgrass, it is located in relatively shallow waters, and is so large that it encompasses various habitats, with the southernmost regions being colder and temperate, with the northern regions being tropical and warm. Sprawling with life, this massive archipelago also holds a lot of endemic terrestrial fauna, with species developing from the marine pelagys living in these closely interconnected islands. It is estimated that there are around 1,100 islands in this archipelago. Just east to this lies the Zirconian Ocean. and a small island.

The small island is called Pulau Kecil (literally "small island" in Bahasa Indonesia). While not nearly as biodiverse, it is known for exceptionally shallow seas and immense carpgrass cover, being surrounded by the largest carpgrass meadow on Alladoras. Many species of carpgrass-endemic species, such as the greater harpooner can be found here. It serves as an important nursery for numerous southern species.

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Now, we head to the larger landmasses. In the North Pole, lies Kryos. Shrouded in ice and shadow for one half of the 405 day year of Alladoras and bathed in light in the other, it is a cold place. The largest island on Alladoras, Kryos is shaped like a crescent, with the massive gulf hosting productive forests of kelgroves (similar to kelp) during the summer that retract their leaves and remain dormant during the long winters, it is one of the most productive areas in Alladoras during the summers. During the winter, the gulf gets covered in extensive ice sheets alongside the surrounding waters of the island.

Larger than Kryos and Alladoras's only continent is Pisciaustra. Being the only continent, it also has other titles: it is also one of two deserts on Alladoras (Kryos is the other) and is the largest, while also being the most uninhabited landmass. Even on Kryos, there are terrestrial moss-like organisms that hunker down on rocks. Pisciasutra is desolate and uninhabited, battered by winds and snow. No life lives on it. The only life that manages to do so are underwater: Pisciaustra's surrounding coastline is exceptionally productive during the summer months, and the gulf also hosts species of buoykelp that form thick rafts in the surface, and the abyssal fauna are extremely diverse due to the depths that surround Pisciaustra.