Crews with more than one species have to make room for each other, or tempers rise fast.
Sereans. They are built for thick air and flight. In normal gravity they tire fast and need a harness sling or a padded seat. A Serean forced to stand all day gets cranky. Smart crews keep a hammock rig for them.
Keth. Their bones are hollow, so hard drops and steep stairs are dangerous. They want ladders, ramps and padded grips. A ship with only steep steel stairs is a real danger to a Keth.
Vellari. They dry out in dry air. On long trips they need a mist spray or a damp cabin. Taking that away is seen as cruelty.
Talarq. They need heat. A cold ship makes them slow. Most crews give them a heat rod and a warm corner. Everyone else complains about the corner.
Caraphex. Their shells are tough, but they are heavy. A cheap cot breaks under them, and they take it as an insult. Give them a solid bunk and a locker for tools, and they stay loyal.
Synthborn. They need power and a repair bench. A crew that cuts their power or blocks their repairs is asking for a walkout. Many carry their own charge packs.
Humans. Humans adjust easily but expect everyone else to adjust to them. That causes friction.
* *
Each species has a few things it will not bend on.
Keth. Dates, amounts and pay must be exact. A vague deal is worthless to them.
Vellari. They always ask about water. Who gets it, who pays for it, and where it came from. A deal that skips water is not finished.
Talarq. Parts must be real and rated for the heat. A fake part is sabotage in their eyes.
Caraphex. They want tool access, fair hours and pay on time. Late pay is theft, and a clade does not forget it.
Sereans. They care about storm seasons. Ask them to fly into a known storm and they will refuse and take offense.
Synthborn. They want the right to repair themselves. A contract that blocks that is slavery to them.
Humans. It depends. Core humans like long contracts full of fine print. Rim humans expect to renegotiate when things change.
* *
Most fights on mixed crews are about money, safety and survival, not culture.
Late pay. Caraphex and Synthborn take it as betrayal. Talarq mark the client as unsafe. Humans add interest.
Unsafe work. Keth walk off bad navigation jobs. Talarq will not touch fake parts. Vellari hate wasted water. Sereans will not dive into a storm for any price.
Small slights. Forgetting a Talarq's heat or laughing at a Serean's harness turns into a real fight if it keeps happening.
How it ends. Money, if anyone has some. A local judge or a data broker's records. A fistfight or clade justice on the Rim. Or someone walks away and eats the debt.
* *
Keep your own logs. Write down jobs, deliveries and payments. Every species trusts a log more than a promise.
Take turns. One week the ship runs warm for the Talarq, the next week damp for the Vellari. Everyone is a little uncomfortable, and that is fair.
Use people's strengths. Put the Keth on the charts and the Caraphex on the heavy lifting.
Pay on time. Even a small delay causes lasting grudges.
Never sell fake parts or fake charts. It makes enemies fast.
Respect what people need to live. Harness, damp air, heat, a strong bunk and power. Taking these away is an attack.