Bertness says the marshes are being overrun by purple marsh crabs because their main predators, blue crab and finfish, are being overfished. So, the purple marsh crabs are free to gorge on healthy ...

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we'll assume that you are happy to receive all cookies on the BBC website.

If you find one of these crustaceans at the beach hunkering in a rockpool, it will likely either scuttle away sideways and hide in some seaweed or stand its ground and brandish a pair of pinching ...

Instead, you can really elevate the dish by tossing in a pinch of dashi ... crab salad is made using imitation crab meat, ...

The colossal pinching of these two land masses ... little crabs using its needle-like teeth to pierce the crabs' shells. Bude's fossil fish is found nowhere else in the world and what makes ...