There are roughly 90 different extant species of he phylum Ctenophora, or comb jelly in waters around the world. The bodies are mostly made of jelly, and they have a single cell layer on the outside and another in the internal lining.
Adults vary wildly in size, running for a few mm to as much as 1.5 meters in size. The comb jelly moves in a rippling motion by using 8 rows of plated in their body. The majority of the species catch their prey by using a pair of long tentacles.