The Inhabitants of the Aquarium 161 



the head on the higher level, with only the 

 pectoral and dorsal fins in rapid motion. It 

 inhabits the waters of most of our easterly 

 states. 



Fig. 79. Mud Minnow, Umbra limi 



The Pirate Perch (Aphredoderus say anus) 

 is a rare and interesting fish. As it is noc- 

 turnal in its habits it is difficult both to ob- 

 tain and to observe. The body is compact, 

 the head large and somewhat blunt, and the 

 lower jaw protruding. The color of the 



