Spines may also be cut and their rings counted to provide the fish's age, much like a forester would age a tree trunk.
(Spines; may also be cut; ) (their rings; counted; ) (their rings; to provide; the fish's age) (a forester; would age; a tree trunk)
Spines their rings their rings a forester
may also be cut counted to provide would age
the fish's age
a tree trunk