Reef Patrol

Dive in. The fish keep swapping places when you aren't looking.

Ocean Puzzle #1

Only sharp eyes can solve this one

4 differencesCasual

The Ocean Test #2

Can you beat this in under 38 seconds?

4 differencesCasual

Ocean Trial #3

Warning: difference 4 is brutally well hidden

4 differencesCasual

Ocean Hunt #4

Beat the clock: 38 seconds, 4 differences

4 differencesCasual

Hidden Ocean #5

9 out of 10 players miss the last one

5 differencesTricky

Ocean Challenge #6

Only sharp eyes can solve this one

5 differencesTricky

Ocean Challenge #7

Can you beat this in under 44 seconds?

5 differencesTricky

The Ocean Trial #8

Sharp eyes only — 5 differences, one screen

5 differencesTricky

Ocean Trial #9

Warning: difference 6 is brutally well hidden

6 differencesHard

Ocean Scan #10

Warning: difference 6 is brutally well hidden

6 differencesHard

Ocean Hunt #11

You'll probably never find all 6 differences

6 differencesHard

The Ocean Scan #12

Most people give up before difference 6

6 differencesHard

About the ocean pack

Ocean scenes use a fixed palette and a repeating object set, which is exactly what makes them a good test: your eye keeps sliding over the changed object because it looks like all the others. Differences here are always one of five types — an object removed, recoloured, resized, moved, or duplicated.