Because of the placement of their legs.
yes
A giant coconate crab moves sideways on its 8 legs
Sideways. Glad to help you m8
They move faster
Crab louse. They infest the pelvic area like head lice. Crabs is just slang.
Sideways.
sideways
It moves sideways .
a crab walks sideways by sticking its claws
It uses its legs and it walks sideways
Yes they move in a sideways Whip-like motion
They already walk sideways, what more do you want?