A crab, shrimp and fish leave their shared home doing the conga

Bent Christensen with permission of Springer

IT SOUNDS like a joke. A crab, a shrimp and a fish went into a burrow, and they left it together – doing the conga. In reality, it’s part of a rare three-way symbiosis.

Predators abound on coral reefs, so some species of shrimp and fish team up for protection: the shrimp digs out a burrow and reinforces it with bits of shell and coral, and then takes in the fish as a lodger. The fish gets a refuge, the shrimp gets an extra pair of eyes to watch out for predators.

Now

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A crab, shrimp and fish leave their shared home doing the conga