chilo mycterus geometricus

from The Collaborative International Dictionary of English v.0.48

Bur fish \Bur" fish`\ (Zool.)
   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}.
   [1913 Webster]