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Open clam shells on a sunlit reef floor holding an octopus, whale, crab, shrimp and dolphin, in front of a row of glowing coral pads with music notes rising

Echo Reef

Brain teasers and memory

By Owl & Anchor · 109 plays

Open 3D clam shells to find matching sea creatures, then echo the reef's marimba songs on glowing coral pads. 36 levels across three reef zones, plus endless echo.

  • desktop
  • mobile
  • tablet
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About the game

Another sea game from us, as promised. This one is a calm memory game on a reef. In pairs rounds you open clam shells to find twin creatures: whales, otters, octopuses, crabs and more. In echo rounds the reef plays a melody on numbered coral pads and you play it back as it grows. In the tide chorus, the order you matched the creatures becomes a song to play back from memory. The reef changes as you go deeper. Pearl shells give you a pearl and peek at their neighbours, currents swap closed shells after a miss, and in the deep glow a lantern fish lights only the shells near it. Play 36 levels in the Shallows, the Kelp forest and the Deep glow, earn up to three stars on each, and try endless echo to see how long a song you can hold. Pearls pay for hints: a glimmer that shows a pair, or a second listen to the pattern. There's no timer. Every shell and pad works with touch, mouse or keyboard, the pads are numbered and shaped as well as coloured, and settings offer slower songs, calm motion and volume.

How to play

Pairs: tap a shell to open it, then tap another to find its twin. Two different creatures close again after a moment, or tap anywhere to close them sooner. Echo: listen to the pads, then tap them in the same order (or press 1 to 6). Tide chorus: after clearing the board, play the creatures in the order you matched them. The hint button spends pearls. Keyboard: arrow keys move between shells, Enter or Space opens one, H is a hint, M mutes, Escape or P pauses.

Devices
desktop, mobile, tablet
Orientation
any

Content notes

Marimba music and sound are part of the echo rounds; the pads are also numbered, so you can play muted.

Screenshots

Coral garden pairs round on sunlit sand: matched penguins, seals and fish sit in open shells while the rest of the clam shells stay closedAn echo round with five numbered coral pads, each with its own shape and colour, around a pearl clam; two pads glow as the player repeats the patternA tide chorus: six coral pads each carry a matched creature, a shark, octopus, squid, fish, coral and shrimp, and the player plays them back in the order they were matchedDark water: a glowing lantern fish lights a few open shells with an otter, a spiral shell and a shark, while the far shells fade into the nightThe reef map with the Shallows zone: the first six levels show three stars, level 7 is next, and the endless echo banner sits on topA phone in portrait playing a 5 by 5 board in the kelp forest, with matched whales, fish, seals and spiral shells and a banner saying the current is moving two shells

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