Yah, you’re thinking mount at level 1? Awesome! Sorry to disappoint, but the mount is a Sea Turtle, and it moves at walking speed (and +60% in water). However you can transfer it to your low level alts so that they can have mounts too.
/use sea turtle
On the plus side, you can increase it’s speed slightly, with Carrot on a Stick, which is a level 6 item.
Note: It IS possible to have a low level character to fish for this item, in Northrend. Just watch for passing patrols before you set up. If you need to, you can use this Fishbot, to do the fishing for you.