What is an edible spiny-finned fish?

You're probably thinking of sea urchins. While not technically a fish, they are spiny-finned marine creatures with edible roe (eggs).

Here's why it's a bit tricky:

* "Fish" is a broad term: It encompasses a vast variety of aquatic animals, including invertebrates like sea urchins.

* Spiny-finned: Sea urchins have spines, but these are not fins. They use tube feet for movement.

* Edible: Sea urchins are a delicacy in many cultures, particularly their roe, known as uni.

While there are a few fish with spines, like the sea robin and lionfish, they are not typically considered edible.

Let me know if you have other details about the fish you are looking for, and I can help narrow it down!