URCHIN LONG FIN

Introduction: • Species: Long-Fin Urchin • Common Names: Long-Spined Sea Urchin, Black Longspine Urchin • Natural Habitat: Found in coral reefs, rocky substrates, and shallow coastal areas across the Indo-Pacific and Atlantic Oceans. Physical Characteristics: • Appearance: Characterized by its long, slender black spines, which can extend up to 12 inches (30 cm) in length. Its body is typically dark and round, with a central disc from which the spines radiate. • Size: Body diameter can reach around 4 inches (10 cm), with spines adding significant length. • Lifespan: Can live for 5-10 years in well-maintained aquariums. Habitat Requirements: • Tank Size: Requires a minimum of 75 gallons due to its size and active nature. • Water Conditions: o Temperature: 72-78°F (22-26°C). o pH: 8.1-8.4. o Salinity: 1.023-1.025 specific gravity. • Aquascaping: Provide plenty of live rock and algae growth for grazing. Be cautious with unsecured objects, as the urchin may dislodge items in the tank. Diet: • Primary Diet: Herbivorous; feeds primarily on algae, detritus, and small organic particles in the wild. • Supplemental Feeding: Can be provided with dried seaweed (nori) and other algae-based foods if natural growth is insufficient. • Feeding Frequency: Will graze continuously throughout the day; supplemental feeding can be done several times per week. Compatibility: • Temperament: Peaceful and generally non-aggressive. • Suitable Tank Mates: Compatible with most reef-safe fish and invertebrates, including tangs, clownfish, and shrimp. • Incompatibilities: Avoid keeping with aggressive species that may damage the urchin or in tanks with delicate corals that could be toppled by its movement. Care Level: • Difficulty: Moderate; requires stable water parameters and an algae-rich environment. • Health Monitoring: Ensure the urchin has sufficient calcium for spine development and monitor for any signs of spine loss or disease due to poor water quality or nutrient deficiencies. Breeding: • Breeding in Captivity: Rarely bred in home aquariums due to their complex spawning behavior and larval development. • Spawning: Broadcast spawners; in the wild, eggs and sperm are released into the water column for external fertilization. Economic Considerations: • Market Demand: Moderate demand among reef tank enthusiasts for their ability to control algae growth. • Pricing: Typically affordable and readily available in the aquarium trade. Sustainability and Conservation: • Wild Population: Generally stable, though overcollection in some areas may pose a threat. • Aquaculture Efforts: Some success in breeding in captivity for sustainability. • Conservation: Ensure ethical sourcing and avoid overharvesting in the wild. Conclusion: The Long-Fin Urchin is an excellent addition to marine aquariums, valued for its algae-eating abilities and unique appearance. While it requires a stable and mature environment, it is relatively easy to care for in tanks with sufficient space and algae growth. Its peaceful nature makes it a great companion for most reef tank setups.