Tethys Glimmerfin (Evo 5)

A warm, shallow inland sea under a yellow sun and Earth-like gravity. Tidal mudflats meet brackish lagoons; oxygen is plentiful in the water, scarce in the thick muck.

Tethys Glimmerfin

Evo 5FishEats plantsShallows / ShoreResilient

Shaped by 🦚 mate competition

This fish has developed vibrant, iridescent scales and enlarged dorsal fins, used in dazzling courtship displays to attract mates.

iridescent scalesdisplay finssexual dimorphism (males larger)reduced mouth sizestreamlined body

Size: 20 cm
Diet: herbivore
Habitat: brackish lagoons
Moves by: powerful undulation

Why it evolved

Intense competition for mates drives the evolution of elaborate display structures. Males of the Glimmerfin have evolved brighter, iridescent scales and larger, more ornate fins to outcompete rivals and attract females, a strategy favored by sexual selection in the Tethys Shallows' clear, sunlit waters. This energetic investment in display comes at the cost of reduced energy for growth and potentially a less robust filtration system, making them more vulnerable to the Verdant Tidewallow Gulpfish.

What changed from Tethys Bloom-Eater

Gained:+ iridescent scales+ display fins+ sexual dimorphism (males larger)+ streamlined body

Lost:herbivorous specializationelongated, streamlined bodyefficient filtration systempelagic juvenile stage

Size: 18 cm 20 cm
Habitat: brackish lagoons and associated tidal flats brackish lagoons

Lineage

resilient
strained
fragile
·
★ canon
🧬 hybrid
💀 extinct

Drag or scroll to move · Tab + Enter for keyboard · click to select, double-click to openView as list11 species

Apply a pressure

You choose the situation, not the result. Selection acts on Tethys Glimmerfin; the descendant appears above.

Climate

Resources & space

Predators & life

Habitat & extremes

Cross-breed

Mate Tethys Glimmerfin with another branch of the same lineage to make a hybrid.