Continuity mistake: When Dr. Smith is attempting to resuscitate Judy, she is strapped to the bed. Yet when they make the jump into hyperspace, she is suddenly unstrapped and floating. (00:33:30 - 00:35:55)
Continuity mistake: When Penny is sliding down the rope to get the microsealer, she knocks the silver device to the edge of the toolbox. In the subsequent closeup, the silver thing is back in its original place. (01:26:45)
Answer: He meant (as he says shortly after) that the spiders on the Proteus (that infected Smith) eat their dead/wounded, so when spider Smith's egg-sack is ruptured, the babies eat him.
Xofer