Octopus aegina is an important species in Tamil Nadu coastal region having good nutritional values. In the present study, the histological investigation of the different tissues (Gill, liver, muscle, gonad and ovary) of Octopus aegina collected from Pazhayar, Kollidam Taluk, Nagapattinam District, Tamil Nadu, India. The present work on histological observation was carried out in gill, liver, muscle, gonad and ovary that had resulted from marine Octopus aegina.
