The planet Almaishah is the creation of YouTube user Dapper Dino and its inhabitants are the collaborative effort of many speccers and artists. Every few months, the project enters a new phase, setting the clock forward ten million years and causing extinctions. New plants and animals are added, but must derive only from those species already in existence. Because it is a collaborative effort, there is some variety in the art style and the length and detail of the descriptions read aloud by Dapper Dino. The large-scale groupings of organisms are more diverse when everyone is trying to take things in different directions. Some focus on behavior, others internal anatomy, others external anatomy.
As of this writing, phase three has just ended. Life still lives primarily in the oceans, but a few animals have adapted to taking short strolls above the tide line. The biodiversity is exciting. The art is professional.
There are boneless tetrapods, some resembling tiny horses or crocodiles, jellyfish-equivalents taking the roles of limpets, leaches, and corals, echinoderm-equivalents sometimes taking the roles of jellyfish, and segmented animals already diversified into forms vaguely reminiscent of fish, turtles, earthworms, shrimp, spiders, beetles, lobsters, swimming centipedes, and giant, blind, heavily-armored worms that slither along the bottom and eat whatever is stupid enough to stumble into their oral tentacles. There are purple plants filling the roles of seaweed, true plants, and corals. There are animal-like swimming green plants, some of which have lost their chlorophyll and become red plankton, and some of which have lost photosynthesis entirely and become vermiform detritivores. There are also animal-like radiotrophs that feed on the energy from radioisotopes, some of which have also developed photosynthesis and chemosynthesis. I don’t understand their anatomy at all.
Watch the ongoing saga on YouTube.