Phycocyanin bụ acha anụnụ anụnụ, protein eke sitere na Spirulina.Ọ bụ ihe mgbagwoju anya nke pigmenti-protein soluble.Spirulina wepụ phycocyanin bụ pigmenti oriri na-etinye na nri na ihe ọṅụṅụ, ọ bụkwa ihe oriri na-edozi ahụ nke ọma maka nlekọta ahụike na nri nri, ma e wezụga na-agbakwunye ya na ngwaahịa ịchọ mma n'ihi ihe onwunwe ya pụrụ iche.