Why does a crab walk sideways?
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"Crabs walk
sideways due to their unique anatomy, which features a flattened body and legs positioned on the sides, making lateral movement more efficient. This sideways gait also helps them navigate through their natural habitats, like
crevices and rocky terrain.
animal-club.co.uk''''

"Never thought about walking next to a crab in that way but you have really presented a wonderful scene or event! In fact, crabs have been created this way since the beginning of time.
Nature has designed crabs in such a way that it is easiest and safest for them to walk like this with their flat bodies and legs on their sides. They can use the legs they have to walk on to protect themselves from danger.
it's surprising to think how effective this unique walking posture of crabs is in surviving in harmony with the cracks and waves of the rocky seashore.
Truly, every detail created by nature is perfectly crafted, which is simply fascinating to see.""
"Huge hawks and wild bald eagles are among some of the birds that make a meal of crabs.
They pick up crabs and take them upwards, throwing them on a hard surface like a stone in order to break the crab's shell and get to the meat. Crabs have a soft shell, making them easy prey for many of their enemies.
When they're under the sea,
Sharks are natural enemies of the crab, relying on it as their only source of food.
Source: Biology Book