A fish-like animal that is a primitive chordate (animals with backbones) and a member of the subphylum Cephalochordata.

- Image ID: X9W2KH
Nature Photographers Ltd / Alamy Stock Photo
Image ID: X9W2KH
A fish-like animal that is a primitive chordate (animals with backbones) and a member of the subphylum Cephalochordata. The body is elongate, laterally flattened and the animal lives in silty sand, filter-feeding by means of the hair-like cirri that surround the mouth.