Here we have the cuttlefish, looking rather startled. Perhaps he has found out he is destined to be chewed up in a budgie cage, poor thing.
Cuttlefish are actually invertebrates, not fish. In fact if you look at them scientifically they are molluscs, and they are related to squids and octopi. However only the cuttlefish has that sought after strange spongy centre shell which acts as a floatation device.