<Table> <Tr> <Th> Fish Fossil range: Mid Cambrian--Recent PreЄ Є Pg </Th> </Tr> <Tr> <Td> Giant grouper swimming among schools of other fish Head - on view of a red lionfish </Td> </Tr> <Tr> <Th> Scientific classification </Th> </Tr> <Tr> <Td> <Table> <Tr> <Td> Kingdom: </Td> <Td> Animalia </Td> </Tr> <Tr> <Td> Phylum: </Td> <Td> Chordata </Td> </Tr> <Tr> <Td> (unranked) </Td> <Td> Craniata </Td> </Tr> </Table> </Td> </Tr> <Tr> <Th> Included groups </Th> </Tr> <Tr> <Td> <Dl> <Dd> Jawless fish </Dd> <Dd> † Armoured fish </Dd> <Dd> Cartilaginous fish </Dd> <Dd> Ray - finned fish (inc . Teleosts) </Dd> <Dd> Lobe - finned fishes </Dd> </Dl> </Td> </Tr> <Tr> <Th> Cladistically included but traditionally excluded groups </Th> </Tr> <Tr> <Td> <P> Tetrapods </P> </Td> </Tr> </Table> <Tr> <Th> Fish Fossil range: Mid Cambrian--Recent PreЄ Є Pg </Th> </Tr>

True fish as per the biological system of classification