ESV: His underparts are like sharp potsherds; he spreads himself like a threshing sledge on the mire.
NIV: Its undersides are jagged potsherds, leaving a trail in the mud like a threshing sledge.
NASB: His underparts are like sharp pieces of pottery; He spreads out like a threshing sledge on the mud.
CSB: His undersides are jagged potsherds, spreading the mud like a threshing sledge.
NLT: Its belly is covered with scales as sharp as glass. It plows up the ground as it drags through the mud.
KJV: Sharp stones are under him: he spreadeth sharp pointed things upon the mire.
NKJV: His undersides are like sharp potsherds; He spreads pointed marks in the mire.