Need a bit more space? A third bedroom, perhaps, or a double garage? Battling estate agents and competing with prospective buyers can be tiresome – but humans aren’t the only ones navigating the housing market.
Hermit crabs have to regularly upgrade to a bigger home, hunting to find a suitable shell that needs to be just the right fit. It’s vital that a hermit crab is never without a shell – otherwise, it would cook under the sun. This is also the case for many other species of rockpool wildlife.
In this BBC Earth video narrated by David Attenborough, you can watch dozens of hermit crabs form a perfect queue, arranged in size order, to swap shells. They form a seamless chain reaction, taking one another’s shells – or, at least, that’s the plan.
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Top image credit: Getty Images