Class FISH

A cold-blooded aquatic vertebrate characterized by fins and breathing by gills. Included here are fishes having either a bony skeleton, such as a perch, or a cartilaginous skeleton, such as a shark, or those lacking a jaw, such as a lamprey or hagfish.
Subclass-Of: Vertebrate
Axioms:
(=> (Fish ?Self)
    (And (Exists (?A) (And (Component ?Self ?A) (Cold-Blood ?A)))
         (Exists (?B)
                 (And (Embodies ?Self ?B)
                      (Breathing ?B)
                      (Exists (?C)
                              (And (Embodied-In ?B ?C) (Gills ?C)))))
         (Exists (?D) (And (Lives-In ?Self ?D) (Water ?D)))))