A Juvenile Tapeworm That Infects the Kellet's Whelk (image) University of California - Santa Barbara Share Print E-Mail Caption This is a juvenile tapeworm that infects the Kellet's whelk. They grow to maturity in sharks and rays that eat the whelk. Credit Julie Hopper Usage Restrictions None Share Print E-Mail 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.