Various bacteria, archaea, fungi, protists, and other single cellular organisms necessary to build a functional ecosystem are seeded. Anaerobic bacteria, single cellular plankton, and chemosynthetic bacteria in hydrothermal vents shall be specifically mentioned because of their relevance to the larger organisms on the list.

Phytoplankton including but not limited to cyanobacteria, diatoms, and dinoflaggelates. These important organisms will provide a majority of the food and oxygen for the animals living here.

Kelp and other macroscopic algae will create forests important for many future organisms.

All sorts of sponges are seeded, in the early periods they will be the major reef builders.

Mangrove swamps will be super important havens for reef animals, they will be the starting habitat of the Golden jellyfish. Mangrove trees struggled to spread at first, due to lack of pollinators they had to rely on wind to spread pollen. It took several decades for mangroves to spread but once many were in close proximity wind pollination became viable and they adapted to utilize it more effectively.

The genus Psuedopterogorgia, soft corals living in reefs around the world that mainly consume phytoplankton and detritus. Some have algal symbiotes while other don't. The genus Zoanthus, a soft coral that grows in tropical reefs. They possess symbiotic zooxanthellae algae within their tissues and gain most of their energy from photosynthesis.

Mastigias cf. papua etpisoni, the golden jellyfish. On Earth they are only native to a specific marine lake with no predators, but on this seeded world the environment is perfect for them to spread over. Though at first they will likely stay in estuaries and mangrove forests to avoid fast wave action. Like corals, they possess zooxanthellae and gain most of their energy from photosynthesis.

A genus of macroscopic, yet still small and unassuming, enoplan nemertean worms. They feed on algae and protozoans.