The anatomical features of Gamera and his foes are detailed in a set of illustrations found in one volume of the Kaijū-Kaijin Daizenshū movie monster book series published by Keibunsha in 1972.

Barugon

Barugon’s features include dorsal spikes that produce a deadly rainbow ray, an organ to produce frosty liquid (-100 degree Celsius) that can be shot from his 30-meter-long weaponized tongue, a stomach that can digest diamonds (his favorite food), and radar horns atop his head.

http://pinktentacle.com/2011/01/illustrated-anatomy-of-gamera-and-foes/