Trypanorhynch cestodes

Cestodes characterised by having a scolex with four eversible Tentacles armed with hooks, two or four Bothridia, and sometimes Ciliated pits and Prebulbular organs

Adult forms of them exist in the digestive tract of final hosts (Elasmobranchs: Sharks and Rays)

First intermediate hosts: Invertebrates

Second intermediate hosts or paratenic hosts: Teleost fishes and some invertebrates