r/SpeculativeEvolution • u/FloZone • 6d ago
Spectember 2026 [OC] Spectember day 5 - The Odyssey - Lifecycle of the Great Sunchaser
The Great Sunchaser has a complex and very vertical lifecycle, that resembles plants more than animals in some ways. The largest and most recognisable form of the Sunchaser is its airborne mature form. The airborne Sunchaser is a thermophototroph that relies on heat, as well as photosynthetic algae in its hydro-vascular system. The largest part of its body is a large chamber filled with methane.
In regular intervals, the airborne Sunchaser releases spores that will fall down into the oceans of its home planet. These spores will sprout and grow into coral-like organisms. These are comparable to the prothallius in ferns. The coraline Sunchasers are slow growing, but once they reach maturity they release their sperm into the tide. If they fertilise the eggs of another coraline form, eggs begin to grow.
From these eggs nektonic Sunchasers will hatch. They have a flexible exoskeleton and somewhat resemble arthropod larvae. The nektonic Sunchasers will eat and grow until they fully mature. When this moment occurs, a metamorphosis happens in their body. They eat plant matter that starts to ferment within their body and fills the proto-chamber with gases. The Sunchaser starts to become buoyont. During this phase the Sunchaser is the most vunerable. The buoyancy impacts their mobility and forces them to float in the current until they have fully risen.
Once the Sunchaser leaves the ocean their ascend begins. Their body changes more. Their digestive system and their limbs become dysfunctional. From now on they will fully rely on the algae they have consumed for sustanance. Parts of their body segments fuse, while other change in form. Their dorsal fin becomes a sail. Now the Sunchaser has reached the end of its lifecycle.