Randall's Goby - Amblyeleotris randalli

A settled Red Striped Goby will spend most of the day actively picking at biofilm, algae, and tiny organics on hard surfaces, then show a rounded belly and stable coloration. A stressed or underfed fish often stays thin behind the head, hovers weakly, loses red striping intensity, or ignores prepared foods. In the aquarium, true feeding is usually subtle: they rasp constantly on stone, wood, and glass, and may only take tiny frozen or sinking foods if current is gentle and the food lands near the substrate. A healthy specimen also perches confidently in flow and returns repeatedly to favored grazing spots.

Strong oxygenation and clean, stable water are the two biggest priorities. Red Striped Gobies do best in cool to moderate tropical water, high dissolved oxygen, and noticeable current, with plenty of smooth rock surfaces for grazing. They are poor candidates for warm, stagnant, dirty tanks. Aim for pristine water quality, very low nitrate, and efficient filtration without creating dead spots. They appreciate a tight lid too, because they can dart and jump when startled.

Yes, usually, because they are not predators and are too small-mouthed to bother healthy adult shrimp, snails, or similarly sized peaceful tankmates. The bigger issue is competition and stress: boisterous feeders, fin-nippers, or aggressive bottom dwellers can outcompete them at feeding time or prevent them from grazing comfortably. Ideal tankmates are calm fish that occupy midwater or upper water layers, plus invertebrates that won’t crowd their grazing stones. Avoid large cichlids, loaches that dominate the bottom, and fast surface-to-bottom feeders.

Faded striping is often a stress signal, not necessarily disease. Common causes include poor water quality, insufficient current, low oxygen, inadequate grazing surfaces, harassment by tankmates, or a newly imported fish still acclimating. Color can also change with mood, time of day, and dominance. If the fish is still eating, perching normally, and not showing pinched belly, clamped fins, rapid breathing, or white patches, the fading is usually environmental. First improve flow, oxygen, and food access before assuming illness.

Offer very small sinking foods that mimic what it can pick up from the substrate: frozen cyclops, baby brine shrimp, daphnia, finely crushed quality pellets, micro granules, and occasionally soft frozen foods chopped tiny enough to be pecked at. They are not strong competitors for large particles, so feed in a low-current area or target feed near their favorite rocks. The best long-term condition usually comes from a tank with mature biofilm and algae growth plus supplemental microfoods, rather than relying on prepared foods alone.