His observations on catfish , electric fish ( `` Torpedo '' ) and angler-fish are detailed , as is his writing on cephalopods , namely , `` Octopus '' , `` Sepia '' ( cuttlefish ) and the paper nautilus ( `` Argonauta argo '' ) .
His observations on catfish , electric fish ( `` Torpedo '' ) and angler-fish are detailed . His writing on cephalopods such as `` Octopus '' , `` Sepia '' ( cuttlefish ) and the paper nautilus ( `` Argonauta argo '' ) are accurate .