
1) Fish
Found on
https://www.crosswordclues.com/clue/quillback

The quillback (Carpiodes cyprinus) is a type of freshwater fish of the sucker family. It grows to 26 in (65 cm) and is deeper-bodied than most suckers, leading to a carplike appearance. It can be distinguished from carp by the lack of barbels around the mouth. Its coloration is silvery and it has large scales. It is called quillback because of the...
Found on
http://en.wikipedia.org/wiki/Quillback

• (n.) An American fresh-water fish (Ictiobus, / Carpiodes, cyprinus); -- called also carp sucker, sailfish, spearfish, and skimback.
Found on
http://thinkexist.com/dictionary/meaning/quillback/
Quill'back` noun (Zoology) An American fresh-water fish (
Ictiobus, or Carpiodes, cyprinus ); -- called also
carp sucker ,
sailfish ,
spearfish , and
skimback .
Found on
http://www.encyclo.co.uk/webster/Q/10

USS Quillback was an American Balao Class submarine of 1525 tons displacement launched in 1944. USS Quillback was powered by diesel engines providing a top speed of 21 knots, carried a complement of 75 and was armed with one 4-inch gun, two 20 mm Oerlikon anti-aircraft guns; six 21 inch bow torpedo tubes and four 21 inch stern torpedo tubes.
Found on
http://www.probertencyclopaedia.com/browse/RQ.HTM

a carpsucker, Carpiodes cyprinus, inhabiting waters in the central and eastern U.S., having one ray of the dorsal fin greatly elongated. Also called
Found on
https://www.infoplease.com/dictionary/quillback
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