Is the banana slug or clownfish more similar to a cuttlefish?

The clownfish is more similar to a cuttlefish than the banana slug. Both clownfish and cuttlefish are marine animals, belonging to the phylum Chordata and Mollusca respectively, and share aquatic environments. In contrast, the banana slug is a terrestrial gastropod, making it fundamentally different in habitat and biological classification. Additionally, clownfish and cuttlefish have adaptations for living in water, while banana slugs do not.