Definitions

1. noun

A type of animal that has a body plan characterized by a long, slender body and often a long tail, typically with a segmented exoskeleton.

“The evolution of the celeomorph body plan is believed to have occurred around 500 million years ago.”

2. noun

A member of the subphylum Tunicata, which includes marine animals such as sea squirts and salps.

“Tunicates, or sea squirts, are a type of celeomorph that has a unique life cycle.”