A strikingly marked fish with a long upright dorsal fin, which lives among rocks and corals in the warm waters of the western Atlantic.
- ‘The Jackknife fish will comb the sandy bottom looking for worms, crustaceans, and small fish if it is hungry. It may even eat the occasional fireworm.’
- ‘The jackknife fish is a particularly handsome species, which immediately catches the eye with its long tapering first dorsal fin.’
We take a look at several popular, though confusing, punctuation marks.