cannibalistic       
adjective uk/ˈkæn.ɪ.bəlˈɪs.tɪk/ us/ˈkæn.ə.bəlˈɪs.tɪk/
 (人)食人肉的;(动物)同类相食的
used to describe a person who eats human flesh, or an animal that eats the flesh of animals of its own type
  a cannibalistic killer 食人凶手 
 Spiders are very cannibalistic. 同类相食在蜘蛛中很常见。 
 See: cannibal
 - More examples
 - The novel is about a cannibalistic, mass-murdering psychiatrist.
 - Historians dispute the tribe's reported cannibalistic tendencies.
 - Crabs are cannibalistic - the hard ones eat the soft ones, which have shed their shells to grow.
 - Cannibalistic feeding, whereby cows ate the remains of other cattle, is now banned.