crablike

From crab +‎ -like. In sense “moving sideways”, due to crab’s sideways walk.

crablike (comparative more crablike, superlative most crablike)

1. Having some characteristics of a crab
   • 1931, H. P. Lovecraft, chapter 6, in The Whisperer in Darkness:

     It was in this stream, I recalled from newspaper items, that one of the morbid crablike beings had been seen floating after the floods.

2. Walking or moving sideways

• crab-like rove beetle

• sidle

• bark lice, barklice