Lettuce Nudibranch / Lettuce Sea Slug (Elysia crispata)Deploy a truly unique, solar-powered biological weapon against invasive reef algae. The Lettuce Nudibranch—technically a sacoglossan or "sap-sucking" sea slug—is a fascinating, intricately frilled invertebrate that acts like a miniature precision trimmer for your aquarium. While they easily win points for their mesmerizing, leafy appearance, these peaceful slugs are prized by reefers globally for their highly specialized ability to seek out and eradicate problematic hair algae from the tightest crevices of your live rock.When standard clean-up crew snails ignore tough filamentous growth, a small group of these striking slugs will steadily clean your rockwork without disrupting your aquascape. Quick Care SpecificationsCare Level: ModerateTemperament: PeacefulMaximum Size: 2 to 3 inches in captivityMinimum Tank Size: 10 Gallons (Must have active algae growth)Reef Compatibility: 100% Reef-Safe (Completely safe for all corals, fish, and invertebrates)Water Parameters: 72–78°F, pH 8.1–8.4, dKH 8–12, Salinity 1.023–1.026 SG Key Features & Tank Requirements ✂️ Specialized Bryopsis & GHA HunterA targeted herbivore that feeds primarily on problematic Green Hair Algae (GHA) and thrives on invasive Bryopsis—an annoying turf algae that most other cleanup crew animals refuse to touch. They pierce individual algae cells and suck them dry, cleanly deflating the nuisance patches. ☀️ Solar-Powered "Kleptoplasty"These incredible creatures are living solar panels. When they eat algae, they harvest the living chloroplasts and store them intact inside their frilled ruffles. They use these cells to perform photosynthesis, gathering supplementary energy directly from your reef lights to sustain themselves when algae levels are low. ⚠️ Starvation Warning (Crucial)Because they are strict dietary specialists, they cannot switch to eating dry pellets, frozen foods, or fish waste. If your aquarium completely runs out of green hair algae or Bryopsis, they will eventually starve. Once your tank is immaculate, be prepared to pass them along to another hobbyist with an active algae problem. 🛡️ Intake & Overflow SafetyPossesses exceptionally soft, lightweight, and gelatinous bodies that are effortlessly swept away by moderate reef currents. It is mandatory to cover all open powerhead intakes, wavemaker cages, and overflow drains with fine sponge guards or protective mesh netting to prevent them from getting pulled in. 🦐 Copper and Mineral SensitivityLike all delicate marine invertebrates, they have zero tolerance for copper-based medications, high nitrates, or abrupt osmotic shocks. Always utilize a slow, patient drip-acclimation method over 1 to 2 hours when introducing them to your system.
