Perfect food for fry 
Artemia is a genus of aquatic crustaceans known as brine shrimp, Aqua Dragons, or Sea Monkeys.
Artemia populations are found worldwide in inland saltwater lakes, but not in oceans. Artemia are able to avoid cohabiting with most types of predators, such as fish, by their ability to live in waters of very high salinity (up to 25%). A very high nutrient food and great for colour enhancing, perfect fro fresh water and marine fish as part of a varied diet with Red Rotifer, Marine Whiteworms etc.
Decapsulated brine shrimp eggs in water, ready to hatch.  These have had the outer shell removed which greatly increases the hatch rate and ensures they can't get stuck in the intestinal tract of your fish.  Keep them in the fridge until use then leave them at room temperature or floating in your tank for 24 hours and you will have a bag of newly hatched brine shrimp nauplii, ready to sieve out and feed to your fry/fish. 
 
To store, hatch and feed hatch in the bag nauplii:
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·         Keep refrigerated until ready to use
·         Remove from fridge and keep at room temperature or slightly above for 20-24 hours
·         Feed as soon at the majority of cysts have hatched and you can see plenty of movement when the bag is held still and viewed against a light
·         If feeding to salt water fish the contents can be emptied straight into the tank - the water is relatively low salinity of around 15ppt
·         For freshwater fish strain through a fine mesh net of 200 microns