Newly hatched Artemia salina nauplii are the cornerstone of successful fish breeding. These tiny brine shrimp are the perfect first food for fry from cichlids and livebearers, as their erratic movements immediately trigger the fishes' natural hunting instinct.
Natural Habitat and Cysts
Artemia salina originate from hypersaline lakes worldwide. They produce hardy cysts (eggs) capable of surviving desiccation for years, making them easy to store and hatch whenever needed.
The Hatching Process
To achieve a high hatch rate, you must replicate their saline environment: *Water and Salt:** Use approximately 1 liter of water with one teaspoon of non-iodized salt. *Aeration:** Vigorous aeration is required to keep the eggs in constant suspension, preventing them from settling and suffocating. *Temperature:** At temperatures between 25-28°C, hatching usually occurs within 24 hours. Cooler temperatures will extend this to 36-48 hours.
Nutritional Optimization
Nauplii reach their peak nutritional value immediately after hatching while their yolk sacs are full. After 24 hours, their nutritional profile drops significantly unless they are enriched. Any surplus can be frozen in thin sheets for emergency feeding.
Feeding Procedures
Turn off the air supply to harvest. Since nauplii are phototactic (attracted to light), use a flashlight to gather them in one spot. Draw them out with a syringe and always rinse them in an Artemia sieve with fresh water to prevent salt buildup in the fry tank. You can easily tell when the fry are full, as their bellies will become distended and take on a pink/orange hue.
