Patagonian octopuses
... that small female Patagonian octopuses often choose an empty mollusc shell to lay their eggs in?
... that small female <b id="mwBS0"><a href="./Octopus_tehuelchus" id="mwBS4" rel="mw:WikiLink" title="Octopus tehuelchus">Patagonian octopuses</a></b> often choose an empty <a href="./Mollusca" id="mwBS8" rel="mw:WikiLink" title="Mollusca">mollusc</a> shell to lay their eggs in?