I was wondering if anyone had seen or done any artwork for a Star Trek colony ship. We know there are Earth colonies out there, but the ships they take are never seen.
-class shuttlecarriers in the Ships of the Star Fleet
books were used, among other things, to establish military colonies along the frontier. These colonies would form the nucleus for later colonial expansion and themselves be intended to develop into starbases. The ships were huge and while they didn't carry animals for agriculture, they did carry a great deal of cargo.