
1) Spiny puffer
Found on
https://www.crosswordclues.com/clue/burrfish

• A spinose, plectognath fish of the Allantic coast of the United States (esp. Chilo mycterus geometricus) having the power of distending its body with water or air, so as to resemble a chestnut bur; -- called also ball fish, balloon fish, and swellfish.
Found on
http://thinkexist.com/dictionary/meaning/bur_fish/
Bur' fish` (Zoology) A spinose, plectognath fish of the Allantic coast of the United States (esp.
Chilo mycterus geometricus ) having the power of distending its body with water or air, so as to resemble a chestnut bur; -- called also
ball fish ,
balloon fish , and
swellfish .
Found on
http://www.encyclo.co.uk/webster/B/114

USS Burrfish was an American submarine of 1525 tons displacement launched in 1943 which saw action during the Second World War. USS Burrfish was powered by diesel engines providing a top speed of 21 knots 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/RB.HTM

[
n] - any of several fishes having rigid flattened spines
Found on
http://www.webdictionary.co.uk/definition.php?query=burrfish
noun any of several fishes having rigid flattened spines
Found on
https://www.encyclo.co.uk/local/20974

any of several porcupinefishes of the genus Chilomycterus, covered with short, immovable spines.
Found on
https://www.infoplease.com/dictionary/burrfish
No exact match found.