Stiphodon percnopterygionius — Flame Stiphodon

Overview

A striking species with orange-red males and blue-edged fins. One of the most sought-after Stiphodon species among nano-fish enthusiasts.

Appearance

Shared with the species: Stiphodon Gobies

Sexual dimorphism is extreme in this genus. Males are strikingly coloured with species-specific patterns of electric blues, vivid oranges, reds, and iridescent highlights. Females and juveniles are uniformly drab olive-brown, making species identification of non-breeding individuals very difficult. Adults reach 4–6 cm. The pelvic fins are fused into a suctorial disc, allowing the fish to cling to smooth rocks in fast current. The body is compact and cylindrical, well adapted for life in high-flow environments.

Care

Shared with the species: Stiphodon Gobies

A minimum 60-litre aquarium is recommended for a group of 4–6 gobies. The most critical care factor is strong water flow — 10–15 times the tank volume per hour using powerheads, river manifolds, or canister filter outputs — replicating their natural stream habitat. Substrate should be smooth rounded river rocks with sand or fine gravel between them to allow natural grazing behaviour. Water must be pristine and well-oxygenated: 22–26 °C, pH 6.5–7.5, GH 4–12 dGH, nitrates below 20 ppm. Establishing a good growth of diatoms and biofilm on rocks before introducing the fish is strongly recommended.

Feeding

Shared with the species: Stiphodon Gobies

Stiphodon gobies are obligate biofilm and algae grazers that scrape diatoms, soft green algae, and associated microorganisms from hard surfaces. In captivity they typically ignore flake food, pellets, and algae wafers. The primary food source must be biofilm grown on rocks and other hard surfaces in the tank. Some keepers supplement with blanched vegetables (zucchini, spinach), and certain individuals can be trained to accept small live or frozen foods such as brine shrimp or microworms. Starvation is the leading cause of death in captivity.

Compatibility

Shared with the species: Stiphodon Gobies

Males are territorial and compete for rock territories; maintain a ratio of 1 male to 2–3 females to minimise aggression while showcasing colour displays. Compatible with other small, peaceful stream-adapted species including Rhinogobius gobies, hillstream loaches (Sewellia, Gastromyzon), White Cloud Mountain minnows, and Otocinclus. Avoid warm-water tropical fish, large or aggressive species, competing bottom-dwellers, and most shrimp.

Breeding

Shared with the species: Stiphodon Gobies

Breeding in captivity is not achievable because larvae require a marine or brackish water phase (amphidromous life cycle) before returning to freshwater as juveniles. All specimens in the aquarium trade are wild-caught. Males display intensely to females through fin-flaring and colour intensification; eggs are deposited in crevices or under rocks and guarded by the male. Upon hatching, larvae drift downstream out to sea before metamorphosing and migrating back to freshwater streams.

Fun facts

Shared with the species: Stiphodon Gobies

All Stiphodon gobies are amphidromous — larvae must pass through a marine or brackish phase, making captive breeding impossible. Males can shift from muted to brilliant colouration almost instantaneously during territorial and spawning displays. There are over 30 described species of Stiphodon, many discovered and formally described only within the last few decades.