<p><em><strong>Mesonychoteuthis hamiltoni</strong></em> is the largest of all cranchiid species with adults reaching over 2 m in mantle length (Nesis, 1982). It is a circumpolar Antarctic species with young found north to the subtropical convergence (Nesis, 1982).</p> <h4>Brief diagnosis: </h4> <p>A taoniin ...</p> <ul> <li> with hooks on the arms and tentacle clubs. </li> </ul>