fisha

Fisha is a fictional genus of small freshwater fish created for speculative biology, worldbuilding, and online fiction. It is not a real taxon used by scientists in the field.

Description: Fisha individuals are slender and, on average, 6 to 10 centimeters long. They have a laterally compressed body, silvery gray coloration with iridescent blue-green bars along the flanks, and a single dorsal fin with a faint dark edge. Scales are fine, and the head profile is rounded.

Habitat and distribution: In the imagined ecosystem of the River Allion, a temperate freshwater system, Fisha prefer slow to moderate currents and vegetation-rich shallows. They are described as endemic to this river basin, with occasional reports of naturalized populations in adjacent ponds within fiction.

Ecology and behavior: Fisha are schooling fish that form mixed-sex aggregations. They are omnivorous, feeding on algae, small invertebrates, and detritus. They are diurnal and rely on camouflage and schooling to avoid predators.

Reproduction and life cycle: Fisha are oviparous. Females lay eggs on submerged plants in spring, and males guard the brood for a short period before dispersal of fry.

In culture and naming: In fictional texts, Fisha is sometimes portrayed as an ornamental species due to its iridescence. The name combines the English word "fish" with the Latin-sounding suffix -a; the genus is attributed to a fictitious ichthyologist in worldbuilding guides.