What are facts about brine shrimp?

Brine shrimp refers to Artemia salina and about 10 other related species. They are rather small anostracans, reaching only 0.6 in (15 mm) in length. The color varies from almost hyaline and transparent to bright red. The male antenna is strongly modified, but is not sufficient to identify the species. Microcharacters are required for identification, as well as biochemical and molecular methods.