A mysterious purple orb spotted on the sea bed during a live-streamed ocean exploration temporarily stumped scientists.
The colourful orb was seen near the Channel Islands of California by the Exploration Vessel Nautilus, a scientific expedition equipped with a live broadcasting studio.
The apparently otherwordly lifeform was spotted in a rocky crevasse by a remote-controlled rover, and scientists scratched their heads for several minutes during the live broadcast, trying to explain what viewers could see.
One said: "What is that? I actually have no idea."
Another said: "I'm stumped, I have no idea. What if it's an egg sac of some sort? A spider egg sac?"
They directed the vessel to use its suction tool to capture orb for a closer look.
But as the suction tool moved in, a large red crab appeared to take an interest in the purple curiosity.
It began stroking the orb, which has a light pink centre.
The vessel triumphed and captured the orb in its on-board laboratory — and scientists were quick to conclude that it is likely to be a new form of the nudibranch marine mollusc.
On their YouTube channel the researchers wrote: "We won't know definitively what it is for a while. It could possibly take years for scientists to determine if it's a new species."
But viewers continued to speculate on the orb's nature in the video's comments section.
One joked that it looked like a new type of Pokemon, while another asked whether it was an alien egg.