"Ferocious creatures" refers to animals or beings that are extremely aggressive, fierce, and dangerous. They can be powerful and violent, causing harm or posing a threat to others. Full definition
T. rex may have been the most ferocious creature in the jungle, but something as simple as growing hair may have helped mammal - like reptiles to outlive this scary beast. (sciencedaily.com)
Using sign language to communicate, which they are well - versed in due to daughter Regan's (Millicent Simmonds) deafness, they are some of the presumed final surviving humans who have been decimated by ferocious creatures with unparalleled audio ability. (ioncinema.com)
(Note that the Bulldog of 200 years ago was a vastly different, more ferocious creature than the lovable «sourmugs» of today.) (akc.org)