Where are Fish aboard Arch?

It seems like you're asking about the location of fish aboard the Ark.

There's a little confusion in your question:

* The Ark: This typically refers to Noah's Ark from the biblical story. Fish wouldn't have been on board because the Ark was designed to save land animals from a flood. Fish already lived in the water.

* Arch: This could refer to a structure, but it's not a specific term related to a ship or vessel.

To help me answer your question, please clarify:

* What type of Arch are you referring to? Is it a specific ship or structure?

* What kind of fish are you asking about? Are you interested in fish being stored, transported, or something else?

Once you provide more details, I'll be able to give you a more accurate answer.