This paper describes the determination of TVB-N-value, indol, biogenic amines and sensory skor in a representative number of frozen (20)/cold (5) storage shrimps und mussels (10) of the Turkish market. Over all 45 Products of shrimps und mussels were tested. Indole concentrations of 15 frozen shrimps, 5 frozen mussels were determined. Products contained > 100 mu g/kg indol. In 10 frozen and 5 cold storage of shrimpssamples TVB-N-value was > 35 mg/100g, but in 10 samples putrescin content > 60 mg/100.