With another net downstream, they've sealed off the fish that live in a 200-foot stretch of the tiny desert stream and will capture the creatures and study them, including recording their age, size and sex.
(they; 've sealed off; the fish that live in a 200-foot stretch of the tiny desert stream) (the fish; live; L:in a 200-foot stretch of the tiny desert stream) (they; will capture; the creatures) (they; study; them)
they the fish they they
've sealed off live will capture study
the fish that live in a 200-foot stretch of the tiny desert stream
L:in a 200-foot stretch of the tiny desert stream
the creatures
them