One species of these animals often has its eyes infected by the copepod Ommatokoita elongata, (10[1])which might attract prey through bioluminescence. That species of these animals contains toxic amounts of trimethylamine N-oxide and urea, (10[1])which allows it to live at great depths. (10[3])This is the largest group of animals whose intestines contain a spiral valve to increase surface area and a specialized liver full of squalene to maintain buoyancy. (10[1])The cephalofoil shape of one of these animals’ heads is thought to enhance electroreception. (10[1]-5[1])A slow swimming “sleeper” one of these animals is named (-5[1])after Greenland. For (10[1])10 points, name these predatory cartilaginous fish that have great white and hammerhead varieties. ■END■ (10[2])