ONE OCEAN. SEVEN QUESTIONS.
There is more beneath the surface.
From a sunlit reef to the abyss: test your knowledge of marine life, habitats and currents.
01 Recall something
One answer. 25 seconds. Read carefully.
02 Go beyond the familiar
Less familiar answers take you deeper.
03 Follow your curiosity
Review, share and explore again.
CHOOSE YOUR NEXT DIVE
An ocean of possibilities.
A LITTLE MORE ABOUT THE DIVE
Knowledge is better
when it surprises you.
Our own curated questions, an original pixel ocean and a small submersible. Scores express editorial familiarity estimates.
Meet the expedition →Why did my answer not count?
Check the prompt’s exact scope and accepted list. Report missing entries after a round.
Can I play again?
One official daily attempt per browser identity. Unlimited and topic practice are always available.
How can I get better?
Read our recall strategy. Keep a reliable candidate ready, then search for connections.