predatory; rapacious.
Also, especially Biology, predaceous.

1705–15; pred(atory) + -acious

predaciousness, predacity [pri-das-i-tee] . especially Biology, predaceousness, noun
unpredaceous, adjective
unpredaceously, adverb
unpredaceousness, noun
unpredacious, adjective
unpredaciously, adverb
unpredaciousness, noun Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source Link To predacious
World English Dictionary
predacious or predaceous (prɪˈdeɪʃəs)
1.  (of animals) habitually hunting and killing other animals for food
2.  preying on others
[C18: from Latin praeda plunder; compare predatory]
predaceous or predaceous
[C18: from Latin praeda plunder; compare predatory]
pre'daciousness or predaceous
pre'daceousness or predaceous
predacity or predaceous

Collins English Dictionary - Complete & Unabridged 10th Edition
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Example sentences
Vernal pools also support several species of insects including predacious diving beetles and crawling water beetles.
In fact, almost all of the predacious fish species in the lake utilize alewives in their diet.
Predacious copepods were not common in the wetlands.
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