Artemia Cysts


Artemia is rich of protein and fat (protein is about 65% and fat is around 24%). Its nauplii also has high nutrition. So Artemia as an important live bait is paid attention by people all the time. Nowadays over 85% culture of seeding aquaculture animals use Artemia Cysts as live bait. engtai brand Artemia cysts (Brine shrimp eggs) is mainly harvested from China Bohai Bay. We use the most advanced technology in the world to process and hatching rate is over 90%. Before leaving our factory our product will be strictly inspected by our own lab and China Commodity Inspection Bureau, which ensure our customer is satisfied with our each consignment.


Hatching Criteria Hatching density of two grams of cysts per liter of saltwater, 28 C incubation temperature, strong aeration and constant illumination over 24 hours. Cyst count is approximately 270,000 cysts per gram.

Artemia Quality Hatching Percentage Nauplii per Gram of Cysts
Grade AA (premium) 90% 260,000
Grade A 85% 253,000
Grade B 80% 245,000
Grade C 75% 235,000
Grade C 70% 210,000
Grade D 65% 190,000
Grade D 60% 180,000


Diameter of Hydrated Cyst 250 microns (average)
Length of Nauplii (Instar I) 470 microns (average)

Processing and Packaging  The raw cysts are harvested directly from the China shandong Bohai Bay, stored at sub-zero temperatures, washed, and dehydrated in modern fluidized bed dryers. The dried cysts are then vacuum-sealed in tin cans (15 or 16 oz.) and packed 12 per case. Storage temperature of finished product is 4 C.

Aquaculture Feed Application  Live feed for larval and post-larval shrimp and fish. Not for human consumption.

Storage  For best results, store under refrigerated conditions between 0 C and +6 C for up to six months. Otherwise, store in a cool place where temperatures will not exceed 28 C for up to 30 days. Keep out of direct sunlight.


Left to right: Artemia slick, corralling artemia, concentration of artemia, hatch test cones.

What are the guidelines for Artemia cysts?

Salinity - 20 - 30 parts per thousand (ppt) salt solution or approximately 1-2 tablespoons of rock salt per quart (or liter) of water. This equates to around 1.015-1.020 specific gravity. A 20% (or around 1/2 teaspoon per quart) concentration of Epson salt or magnesium sulfate can be added to further buffer the hatching solution.

Temperature Optimum temperature for a 24 hour complete hatch 26-28 C. Lowering the temperature would result in a longer hatching time. Do not exceed 30 C.

Light  Illumination is necessary to trigger the hatching mechanism within the embryo within the first few hours of incubation. Maintaining a light source during the entire incubation period is recommended to obtain optimum hatch results and for temperature control.

Aeration Constant aeration is also necessary to provide sufficient oxygen levels for the cysts to metabolize and hatch. A minimum of 3 parts per million dissolved oxygen during the incubation is recommended. Strong aeration will not damage or hurt the brine shrimp cysts or nauplii.

PH A starting pH of 8.0 or higher is recommended. If pH drops below 7.5 during incubation, add a teaspoon of sodium bicarbonate or a pH buffer to raise it above 8.0.

Stocking Density  2 grams per quart or approximately one level tablespoon of cysts per quart is recommended. A higher stocking density will result in a lower % hatch.

Hatching Cone  Flat bottom hatching vessels should be avoided. Cone or "V" bottomed containers are best to insure that the cysts remain in suspension during hatching. Be sure to thoroughly wash the hatching cone with soap and water and allow to air dry between uses.

How do I harvest the baby brine shrimp?
To harvest the baby brine shrimp or nauplii, simply shut off the air and wait a few minutes for the shells and nauplii to separate. The shells will float to the surface and the live nauplii will go to the bottom of the cone towards the light source. Once separated, the nauplii can be siphoned from the bottom or drained from the bottom of the cone through the air tubing.