prickleback: small elongate fishes of shallow northern seas; a long dorsal fin consists entirely of spines
blennioid fish: elongated mostly scaleless marine fishes with large pectoral fins and reduced pelvic fins
infectious mononucleosis: an acute disease characterized by fever and swollen lymph nodes and an abnormal increase of mononuclear leucocytes or monocytes in the bloodstream; not highly contagious; some believe it can be transmitted by kissing