Yellow Striped Clingfish

The Yellow Striped Clingfish (Diademichthys lineatus) is a tiny, specialized reef fish known for its bold yellow racing stripes, unique suction‑cup clinging ability, and close association with long‑spine urchins and branching corals.** It’s striking, unusual, and highly niche — a species best suited for stable, mature nano reefs. 🐟 Identity & Appearance The Yellow Striped Clingfish has a slender reddish‑brown to dark body with two to three bright yellow stripes running the full length. A distinct yellow spot sits at the center of the rounded tail fin. Females have a long, narrow snout, while males have a shorter, rounder snout — one of the few clingfish with visible sexual dimorphism. Size: Up to 2 inches (occasionally listed as 2–3 inches depending on source). 🌍 Natural Habitat Native to Indonesia and the broader Indo‑Pacific, this species lives among: Long‑spine urchins (a preferred host) Branching corals Rocky rubble zones They use these structures for protection, feeding, and anchoring with their specialized pelvic suction disc. 🧪 Aquarium Requirements Minimum tank size: 10 gallons (20 gallons recommended for stability). Aquascape: Heavy rockwork, caves, cracks, and crevices; ideal if paired with a long‑spine urchin or branching coral. Lighting: Moderate to high depending on coral host. Lid: Tight‑fitting — clingfish can jump. Water stability: Essential. This species is sensitive to parameter swings. Preferred parameters: Temp: 72–78°F Salinity: 1.020–1.025 pH: 8.1–8.4 dKH: 8–12 🍤 Diet & Feeding A carnivore that thrives on small, meaty foods: Mysis shrimp Finely chopped marine fish or squid Vitamin‑enriched brine shrimp Copepods, amphipods, zooplankton In the wild, they also consume parasitic bivalves that attack corals — a unique ecological role. Feed small portions 2–3 times daily; they are deliberate feeders and may require targeted feeding in busy tanks. 🤝 Temperament & Compatibility Peaceful and reef‑safe. May show mild aggression toward other clingfish. Best kept with small, non‑aggressive tankmates. Avoid large predators or boisterous fish that may outcompete them. Safe with corals and most inverts; their natural diet focuses on tiny crustaceans and parasitic mollusks. ⭐ Why This Species Stands Out Rare in the trade and visually striking. Fascinating urchin‑symbiotic behavior customers love to watch. Excellent for nano reef showcases where its patterning and perching behavior can be appreciated. Provides natural micro‑pest control by consuming parasitic mollusks.