The venomous blue-lined octopus is one of many species that engages in sexual cannibalism. Get the Popular Science daily newsletter💡 Breakthroughs, discoveries, and DIY tips sent every weekday.

A netizen and her child in Boljoon, Cebu, couldn't help but marvel at an octopus with vibrant blue rings. According to Kuya Kim on "24 Oras," Thursday, the woman's child also touched the octopus ...

Blue-ringed octopuses carry enough venom to kill 26 adult humans within minutes. NEWS.com.au He said the octopus started off at a green seaweed color but quickly began to show its blue rings.

Male blue-lined octopuses inject a powerful neurotoxin into the hearts of females before mating to avoid being eaten, according to a new study. CNN values your feedback 1.