text: Cuttlefish have an internal shell ( the cuttlebone ) , large W-shaped pupils , and eight arms and two tentacles furnished with denticulated suckers , with which they secure their prey .
simplified: Cuttlefish have an internal shell ( called cuttlebone ) , large eyes , and eight arms and two tentacles furnished with denticulated , or finely toothed , suckers , with which they secure their prey .