Spinal Deformities (IMAGE) NOAA Fisheries West Coast Region Caption X-ray image of three Sacramento splittail with varying spinal deformities. The ear bones of the fish - visible in the x-ray as bright round bones -- held a record similar to tree rings showing when the fish were exposed to elevated selenium linked to the deformities. Credit Betty Ma, UC Davis Veterinary Services Usage Restrictions CREDIT: Betty Ma, UC Davis Veterinary Services License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.