1128

 

 

 

 

 

 

 

 

 

 

 

 

 

The otolith is a bone-like structure found in the inner ear of fish. the otolith can be sectioned and polished to expose growth rings that can be seen using a microscope. counting the growth rings will determine the age of the fish. fish from tropical climates grow year-round and aging fish with otoliths is difficult because growth rings are not formed uniformily.