parrotfish
noun
any of various chiefly tropical marine fishes, especially of the family Scaridae: so called because of their brilliant coloring and the shape of their jaws.
The grammatical form denoting more than one person, place, thing, or idea.
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Around rat-free islands, parrotfishes, a group of herbivores, grazed the entire surface of the reef 9 times per year, whereas around rat-infested islands the equivalent figure was only 2.8 times per year.
From Nature ● Jul. 10, 2018