<Table> <Tr> <Th_colspan="2"> Sea anemones </Th> </Tr> <Tr> <Td_colspan="2"> </Td> </Tr> <Tr> <Td_colspan="2"> A selection of sea anemones, painted by Giacomo Merculiano, 1893 </Td> </Tr> <Tr> <Th_colspan="2"> Scientific classification </Th> </Tr> <Tr> <Td> Kingdom: </Td> <Td> Animalia </Td> </Tr> <Tr> <Td> Phylum: </Td> <Td> Cnidaria </Td> </Tr> <Tr> <Td> Class: </Td> <Td> Anthozoa </Td> </Tr> <Tr> <Td> Subclass: </Td> <Td> Hexacorallia </Td> </Tr> <Tr> <Td> Order: </Td> <Td> Actiniaria </Td> </Tr> <Tr> <Th_colspan="2"> Suborders </Th> </Tr> <Tr> <Td_colspan="2"> <Ul> <Li> Enthemonae </Li> <Li> Anenthemonae </Li> </Ul> </Td> </Tr> <Tr> <Th_colspan="2"> Diversity </Th> </Tr> <Tr> <Td_colspan="2"> 46 families </Td> </Tr> </Table> <Tr> <Th_colspan="2"> Sea anemones </Th> </Tr> <Tr> <Td_colspan="2"> A selection of sea anemones, painted by Giacomo Merculiano, 1893 </Td> </Tr>

The best way to describe the brain of a sea anemone would be as