Currently it is possible to build a cart/train/plane/etc. to move air breathing creatures, though if you want to move water creatures say to aquarium - you can't get them into a tank or have a cart filled with water.

It would be great to have a way to transport water creatures.

Few ideas how that could be done:

1. add a "hopper" like item that could suck in the creature into tank with water
2. add a fake water source blocks that could be placed with super glue to make water travel with a cart also

This issue has been marked as stale because it has been inactive for 3 weeks. It will be closed if it remains inactive for another 3 weeks.

This issue has been closed since it has been inactive for 3 weeks since it was marked as stale.

That's a good idea! I'm sure that the Creators will add that as fast as they can!