Wave power ship

Constructed boats

As yet, there is only one boat that is propelled by wave harnessing fins:

Suntory Mermaid II

Mermaid 2 uses a passive fin mechanism mounted at the bow. A combination of fins and springs capture wave energy, then release it as a propelling drive forwards.

Ship concepts

A conceptual design for a large car ferry has been projected. This is planned to use wave energy as a minor component of its energy supply, the major source of which is hydrogen fuel.

E/S Orcelle

Ship concepts having wave harnessing fins:

Stephen Salter's Cloudseeder