Stellar Biotechnologies, Inc., a biotechnology company, engaged in the aquaculture, R&D, manufacture, and distribution of keyhole limpet hemocyanin (KLH) protein. Providing KLH protein under the Stellar KLH brand, the company offers KLH, an immune-stimulating protein used in the production of various immunotherapies; and as a carrier molecule or finished injectable product in the immunodiagnostic market. Products include Stellar KLH protein in various grades, formulations, custom configurations, and fill finishes for drug development and research applications, as well as KLH-based in vitro diagnostic kits for research and preclinical use. Its customers and partners comprise biotechnology and pharmaceutical companies, academic institutions, clinical research organizations, and research centers.