Meaning of "shark eat shark"

[Sergio Bernal]

English Language Tests, Intermediate level

ESL/EFL Test #201 "Idioms about Animals", question 7

Hollywood is so competitive that it seems like a ......... world, doesn't it?

(a) shark eat shark
(b) wolf eat wolf
(c) dog eat dog

English Language Tests, Intermediate level

ESL/EFL Test #201 "Idioms about Animals", answer 7

Hollywood is so competitive that it seems like a dog eat dog world, doesn't it?

Correct answer: (c) dog eat dog
_________________________

what does mean shark eat shark?

Sergio Bernal

[Mister Micawber]

.
Nothing; it is just a phrase to distract you from the correct idiom, dog-eat-dog.
.
_________________
Canadian-American native speaker
who teaches English for a living at Mister Micawber's
ESL cafe: Interview with Mister Micawber