Simplify the following text for a Grade 10 native English-speaking person.
Original: There are four kinds of Giant octopus : North Pacific Giant Octopus ( E. dofleini ) , Southern Giant Octopus ( Enteroctopus magnificus ) , Enteroctopus megalocyathus , and Enteroctopus zealandicus .
Simplified: Enteroctopus is an octopus genus , many of whose members are sometimes known as giant octopuses .