YIKES,very deadly! "Look: Blue-ringed octopus found hiding in tennis ball -" UPI.com

"Clay Bryce, an aquatics expert with the Western Australia museum, said the venom of a blue-ringed octopus can prove deadly within minutes if it is left untreated.
"If someone does.."

http://www.upi.com/Odd_News/2016/04/06/Children-find-deadly-octopus-inside-tennis-ball-in-Australia/1301459959530/

Vk