The Visitor
Location: Tempest
At some point during your time on the Tempest, you'll be passing by the galley and hear your scanner beep. Investigate to find some suspicious crumbs.
Pathfind the crumbtrail to a pile of clutter near the NOMAD. Ryder will realize that the Tempest probably has the parts to make a humane trap.
Go to the research station, and craft the trap.
Place it by the debris. Leave the Tempest for whatever galaxy-saving derring-do you have lined up, then check back on the trap when you return.
You can either keep the space hamster you've caught, in which case it will live in your quarters, or you can set it free. Either way, you scoop up some AVP for completing the mission.