blue-ringedadj.
/ˈbluːrɪŋd/, U.S. /ˈbluˌrɪŋd/ blue-ringed octopus n. each of several small Indo-Pacific octopuses constituting the genus Hapalochlaena, which can change their colour to show blue rings and lines, and are noted for being dangerously venomous.
ΚΠ
1933 Victorian Naturalist 49 238 I have seen the small, blue-ringed octopus (Octopus maculosus), common in Sydney Harbour, sitting on about fifty small, white, pea-shaped eggs.
1972 Daily Colonist (Victoria, Brit. Columbia) 26 Jan. 18/6 A small variety lives off Australia, the blue-ringed octopus,..one of the most poisonous of any sea creatures. Its bite can kill a human being within minutes.
2004 Daily Tel. 22 June 12/7 They bought the blue-ringed octopus, which has poisonous glands, from the market in their village, Tam Ngan.
This is a new entry (OED Third Edition, March 2013; most recently modified version published online December 2021).
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adj.1933