On our first island landing in the Galapagos, we saw these colourful beasties. On the black lava, they stood out like, well, a Sally Lightfoot Crab, I guess.
They might have evolved a coloration that would allow them to, you know, blend in a bit better. They didn’t.
But they do have super hard shells. Apparently, the shell doesn’t break even if dropped from a great height, so birds – the main predators – leave them alone.
But the babies have soft shells, and they also live on that black lava. And whaddya know? They’re black: The better to, you know, blend in, perhaps? Not that it always works . . .