Ah yes, a fresh new Easter Egg! If you have Developer Preview 4 of Android O on your device, you have a new Easter Egg to find in the Settings. For the first three DPs there was a cat emoji but that is now replaced with an octopus that you can interact with on your phone.
For those who don’t know how to get to it, it is easy. In Settings go to System>About Phone then tap on the Android Version 3-4 time really fast. This will bring up an Android O logo. Now tap on that 5 times real fast then hold it. It will disappear and bada-bing, you have the octopus floating on your screen.