Tunicates, strange tube-like creatures in various colors, shapes and sizes, are found on ship hulls, larger seashells, pier pilings, seafloors and the backs of enormous crabs in oceans worldwide.

Progenitor cells that fulfil all the criteria defining the neural crest have not been observed outside vertebrates. These criteria include an embryonic origin at the lateral borders of the neural ...

(This article forms a part of the Science for All newsletter that takes the jargon out of science and puts the fun in! Subscribe now!) They are a species of marine invertebrates with an evolutionary ...