What would you call a slim fish?

There's no single, universally accepted term for a slim fish. Here are some options, depending on the context and desired nuance:

General terms:

* Slender: This is a general term for a fish with a long, thin body.

* Elongated: Similar to slender, this emphasizes the length of the fish.

* Lean: This suggests a fish with little fat and a streamlined body.

* Streamlined: This specifically refers to a body shape that minimizes water resistance.

Specific terms:

* Ribbon fish: Refers to very long, thin fish, like the Regalecus glesne (oarfish).

* Pike: Pike are known for their long, slender bodies and predatory habits.

* Barracuda: These fish are also long and slender, and are known for their sharp teeth.

Figurative terms:

* Svelte: This implies grace and elegance, which might fit a particularly slim fish.

* Willowy: This emphasizes a delicate, slender form.

Ultimately, the best term to use depends on the specific fish and the context in which you're using it.